I'm sorry hun that your parents don't realize what they are doing. First thing you gotta remember is that parents make many mistakes, just like everyone else. Parents sometimes forget what it was like to be a teenager, they forget the pressures, the frustration they felt, etc. But you also need to know, raising a family, keeping bills paid, etc, is a lot of pressure and frustration for parents. Kids want a lot of things, name brand clothing, cell phones, mp3players, etc...and things are expensive, too expensive.
A little run down of it for my family of 5 is, 600 a month on food, 300 to 400 a month for heat/electricity, cable is 150 a month, phone/internet is 85 a month, car expenses 200 +a month, new clothing/nessecities run around 500, entertainment (we are cheap with this, we prefer to read a lot) about 100 a month. Housing is 750 a month, does not include taxes and insurance. And that is not all. There are doctor bills, insurances, savings, misc bills like school needs and dance classes/piano classes...etc...it doesn't seem to end.
I know you are doing the things you are doing as a way to call out to your parents. One thing I learned early on from my own parents, is that you can not be held responsible for your parents mistakes, and that is what you are doing, holding yourself responsible. You need to be proactive for yourself. Do not come out of this at 18 broken, but take away the important lessons you have learned and build on it. Learn what not to do when you are a parent. That is what I did. My mom and dad were not involved in my life unless I didn't clean, or forgot to iron, or had money that they wanted. They didn't know that I was sneaking beer into my room, or trying drugs, or being easy. One day I realized that it didn't matter what I did, the effect of it was on myself, not on my parents. I was only hurting me. I learned to be involved, to help my kids with homework, to listen to them and respect their opinions and ideas. I also learned to back off when I need to, to teach them that housework is not more important than homework (as my parents told me it was) and that kids need to be kids. I learned alot. Be able to say the same.
What I suggest you do first is to find a safe person in your area. A school counselor, a favorite teacher, someone from church (if you go), even someone from a mentor program so you have someone you can talk to. Then if you aren't seeing anyone for your cutting, suicide, drug issues, then find someone. I imagine your parents know about this, maybe request they get a counselor to help with this. Then as far as your parents are concerned, maybe reach out in an unexpected way. Since they get home at 7, maybe have dinner ready, tell them (when they ask what's going on) that you miss family dinners and just wanted that. Don't get into everything yet, just take it in baby steps. Maybe ask your mom to go with you somewhere, like the library, or some social club (something free so they can see that not everything is about money). And do the same with dad. When things are quiet and going well go to one of them and say something like "Mom, I need to talk to you. It's important to me." And tell her what is going on with you. If she doesn't listen, or brushes it off, or it turns into an arguement, then tell her to come to this site. Let her read what you wrote, just to see that her baby wrote it for all the world to see, will show her that it is important and it does matter.
I hope things work out for you. Let me know what happens.
*hugs*
Ceno