You said vows that tie you to this man for life. You owe it to him, your child, and yourself to put every bit if effort nececcary to repair this relationship. I think you need to be in counseling, either individually, and/or marriage counseling.
If you think that marriage is supposed to be easy, fuzzy, perfect, all roses...you've got it all wrong. It is NOT easy adjusting to living with another person, no matter how much you love him...and you've got a child adding stress to the mix...not that we don't love our kids, but realistically, they do put a strain on the husband-wife relationship...any relationship takes hard work to make it last. Marriage isn't about warm fuzzy feelings all the time...there are times when you are really going to piss each other off...it's just life...the key is tolerance...my husband and I have been married for 27 years, with three boys, and we didn't get to this place by having unrealistic expectations. You are a team...each one contributes to the marriage...you are two completely differet people, with different backgrounds and upbringings...I love my husband very much, but I can't say that my love for him is NOT the same as it was when we first got married...we were so young then...it's natural for love to change as you grow together. It's natural for you to feel like your love for your husband fluctuates...it's really hard to love somebody when you're angry and hurt...not knowing exactly what your circumstances are, it's hard to know exactly what to say.
You didn't say why you want to leave...are you fighting a lot? Is he abusive? Is the sex not that great anymore? Is he cheating? Are you? You don't have to be head-over-heels...that's a myth...infatuation is what draws us together...love is what makes us stay...you need time to grow together and learn to appreciate each other for your differences...when we first got married...probably for the first 3 years...we did a lot of "not talking" and door-slamming when we were angry with each other. Through counseling, we learned more positive and constructive ways to communicate...and learned not to hold grudges...it's not fair to re-hash old stuff over and over...how long are you going to carry the anger and hurt of one particular arguement...You don't have to be on the verge of divorce to get counseling...don't let it get that far...
There are some things you can do to get the spark back...start doing little things for your husband...leave a chocolate on his pillow...put a note in his lunch...fix a nice dinner with no occasion at all...get a babysitter and go on a real date with your husband...watch a DVD together at home, after the baby goes to bed...bring him flowers...you get the idea..do or say at least one nice thing for him every day...with no expectation of anything in return...let your husband know just how special he is.
If you think the grass would be greener with a different husband...it doesn't work that way...relationships are hard work...you can't change your husband, but you can change your own attitude and actions.
Do you work outside the home? If not, maybe you need some connection with other moms of small kids. When my kids were little, I belonged to MOPS (Mothers of Preschoolers)...it is a church-based organization, available nation-wide. It is a great way to connect with other moms, hear great words on how to make parenting and marriage work, and get encouragement from other moms. There is nursery care at the meetings, so moms can meet without the distraction of the kids. Moms meet up to the time that their youngest child finishes kindergarten. Babies put plenty of strain on a marriage...take care of yourself...take care of your marriage...
Good Luck...Becky