How to get out of this trapped relationship?

I've been with my boyfriend for a year and a half. Since the beginning of our relationship he has been VERY VERY insecure. I've never cheated on any of my boyfriends in the past yet he cheated on his ex with me and lied to me and said he didn't have a...

girlfriend. I've always been the type of girl to have a lot of male friends and I cut every last one off except one whom I call my brother (because he used to go out with my sister). He still talks about me having male friends and how he doesn't like it. I've never cheated on him nor have I ever gave him a reason to be insecure. He made me erase my facebook yet he has a myspace "because he's and artist" He request a lot of females "to get the females involved in his music". yet if it was me he would have a heart attack. He gets mad if I go over my own best friends house beacuse he thinks their boyfriends friends might like me. I'm basically scared to breathe because he might get angry. He's really immature to top it off. I'm 20, I don't have a life because I don't want him to get angry, he basically forces me to stay at his house. I don't even see my mother or my little sister. He so jealous he doesn't even like to sit next to me when I'm on the phone beacuse he gets jealous if they say anything about a boy. I'm 20, and I'm locked down and trapped.

...Then what are you still doing with the guy?

Have you tried talking to him? (maybe show him this post?)

Here's what you need to do.
Make a T-chart.
Label one side Pros
The other side Cons.

Now start listing things.
If the cons outweigh the pros, then it's time to get out.

he doesn't sound like he deserves you, at all. you should think long and hard about this relationship and where it may go in the future, and if you even want it to continue.

He cheated. He's insecure because he cheated. You'll never trust him again, and he doesn't deserve you. Drop him. Raise your standards.

I tried to leave several times, he cries sings to me, and I can;t stand to see a guy cry. I've tried everything. I don't go anywhere. I don't know what he wants. Not to be naive, but I seriously doubt that he cheated because he's so far up my butt he doesn't have time.

Thanks for the advice.

***he cheated on his ex with me and lied to me and said he didn't have a girlfriend.***

...so... this right up here *points* ...didn't happen?

Pack together your things and live the house when he is not at home. But arrange and prepare everything carefully in time, e.g. agree with your mother that you can go and stay with her for a while. And when you leave the house, just leave a paper on the table with that "Goodbye Baby".