Er...I'm sorry but I disagree with this on many, MANY factors.
You can make more effort to cuddle him & kissing him
I believe she said she has tried that. She has been trying that, and it has not worked. You can only do something so long before you realize that it is not working. Don't just up the amount of something that doesn't work.
Believe me, you wont be happy without him. He will suffer soooo much without you. Its not worth it.
That is not nessessarily true. At all. She isn't happy WITH him, why would it be impossible for her to be happy without him? It's also not nessessarily true that he will suffer a lot without her. That's called being "codependent." The inability to live without one's spouse/bf/gf/partner. Couples should learn to be a part of eachother, not depend on eachother to survive. Couples should be willing and proud to make eachother happy, but should NOT depend on eachother to be happy. Don't make the mistake of making him responsible for ALL your happiness, and don't make yourself responsible for ALL his happiness. That's not fair to either of you. It's good to make eachother happy, to have that in your relationship, and to know that he can be ONE OF the factors in life that makes you happy. But not the ONLY factor. You actually set yourself up for total chaos and being emotionally lost should something happen to split you up. But if you have other things in life aside from your spouse, friends, career, hobbies, children, that also make you happy and help you enjoy life, then breaking up won't be the end of the world. You need to have that confidence in yourself, the personal emotional strength to know that you can (and be prepared to) hold your own.
Touching is very powerful too. It calms him down. He wont be that grumpy anymore.
You don't know that. You do not know this man. You don't know what kind of reaction touching him will cause. What good touching may do for one man, may do very bad for another. Don't presume that touching will solve any and all "grumpy" problems. It isn't that simple. She said that he told her "If my penis is not involved, niether is the rest of me." I would take that as a pretty blatant sign that he does not want to be touched unless it is sexually, and I believe she also said she tried that. I think her problem is way more complex. Especially if he is a binge drinker, as was described. If he has become, or is becoming, an alcoholic, he is going to need WAY more than just "touching." Alcoholism is a much more serious problem.
I'd be very concerned about his alcohol use and the kind of person he becomes when drunk. Don't take that lightly. I would talk to him about how he acts and how he makes you feel when he is drunk and when he says nasty things to you. I would also recommend you get him some help with his alcohol use. That's something that could get worse quickly if not controlled as soon as possible. Get help with that.
He became like this because you changed with him.
This sounds way too much like laying the responsibility for the relationship's strength, and his personality, and his disposition entirely on her, and that isn't fair. She isn't in control of his actions, his personality, or his decisions, nor is she responsible. Don't blame the problem entirely on her by saying that she caused his changes.
He is in charge of his own actions, his own words, and his own decisions. He chooses to get drunk and insult her, he chooses to not allow her to associate with anyone but him, he chooses to covet her and watch her every move, and he chooses NOT to respond to her attempts to bring the sexual part of their relationship back.
Yes, when men reach old age, 50's, 60's, 70's, their bodies naturally drop in sexual performance and of course are not going to be the same as they were when they were in their 20's and 30's. That's just how life goes, however, men continue to make sperm their entire lives, so they are still capable of sexual actions with the right amount of stimulation. It takes a lot more at old age, a lot more, but it is still possible.
So he says that if his penis isn't involved, then niether is the rest of him. Ask him what he wants. What is he into now. Does he want to see you do something you've never done before? Try something new? Get into his sexuality and find out what is missing. Obviously some part of him wants sexual involvement, considering he said that he wants his penis to be involved in your "fun." That's a positive note.
On another note (this is just a possibility, I don't know how you would feel about it) but, because men continue to make sperm throughout life, and he is not focusing the release of that sperm, or any kind of sexual anticipation or buildup, on you, I wouldn't jump to the conclusion that he is completely cellibut and goes without sexual stimulation at all. That would be naive. I'm not saying that he would be cheating, noooo. That's a whole other ballpark, but I would think about the possibility that he may be using porn without your knowledge. It's a possibility, so I would look into it just in case.
So work on him again & get his confidence back. It's not too late.
You can only "work on" someone for so long. You can lead a horse to water, but you cannot make him drink. It sounds like she has been "working on him" for a number of years, yet it is progressively getting worse as he gets older. He has managed to alienate her friends, and does not satisfy her.
You should stay with him forever.
I honestly do not think that she should. It is not fair to her to force her to live with someone who is refusing to satisfy her needs, who refuses her time with friends, and says cruel things to her when he is under the influence of alcohol. Sure, sex is not the most important thing in life, but it is more important than you are giving credit to. I'm not saying she should leave him solely for the reason that he cannot perform anymore, because I believe that there are more factors going into this situation than that. A lot more. I do not think that she should feel guilty if she leaves him, because she has a right to have her needs fulliflled and a right to be happy the way she wants to be. She should not be forced to forego those things just because of him. She has been filling her role as a wife for years, but he has not been filling his role as a husband. Husbands should not get angry when their wives go see friends. Husbands to not posses and own their wives, husbands should make an equal effort to maintain the sexual part of the marriage, husbands should control their alcohol use. He hasn't done that.
But you can change your attitude.
This I agree with. Instead of feeling guilty, tell yourself that you are entitled to your freedom to see friends and talk to other people. You are entitled to sexual satisfaction from your husband (I really hope you know what I mean by that), you are entitled to happiness in a relationship. Married couples should stay married because they want to and love eachother, not because they have to. You should not feel like you have to stay with him without being happy. You should not feel like you cannot survive without him, and he should not feel like he could not survive without you. I would honestly not blame you, nor see you as a bad person if you did leave him.