Would you leave him?? Trust problems. Advice Please!!!?

When I got into this relationship, I gave my boyfriend pretty much all my trust. I started to slowing not trust him, because he said when he got with me he wanted nothing to do with his ex (he cheated on her with me), and they stayed in contact. She was calling my phone to talk to him, saying he gave her my number, and he denied it. I dont know how else she would have gotten my number, and he wouldnt tell her to stop calling, but finally I had to get my number changed. He would stay out a lot or be busy working, but just the things he'd say would make me wonder if something was going on. (He said there was cameras in the house, and that I always act paranoid, and that he sees and hears everything.) One night when I was sleeping my friend from out of state texted me saying ';hey babe';. My boyfriend wrote back acting like he was me. When I asked him why, he said he didnt like how the guy talked to me. He gave me his passwords and I had a feeling about something so I decided to go on his Myspace one night, and he was talking to his ex's sister, she wrote him first asking him if he would have gotten with her if he was never with her sister, and that she has been sexual dreams about him, and wants him to come visit. When he first wrote back, he said it didnt matter because it was 2 years ago, and that she was married and had a baby now. But then he wrote back saying yes he would have gotten with her if he was never with her sister, and he was afraid to visit because he was scared he would want her all to himself. They were talking a lot, and sending xoxo's and I love you, but he said it was a ';I love you'; as in a family thing. He wrote to girls telling them how good they look, and wanting to get together to drink. My name is never mentioned in the emails but he says he has my pictures on his Myspace so I'm just being insecure. I am pregnant and want the best for my son and I. I have been hurt a lot in the past, and going through this with him, I have lost a lot of trust in him. Lately I have been accusive, or bitchy, because I'm afraid of being hurt again. He says the reason he said things about the cameras was just to say it joking around, and that he wrote to the girls because they have low self-esteem and that I'm just insecure. The reason I keep going off on him is because for one, I'm pregnant and feel like he has no time to talk or see me because he's always busy or working. And for 2, back around new years, he got kicked out of where he was staying and moved with his ex for a week. I heard about it and asked him, but he denied it saying he don't talk to her no more. But he finally admitted to living there after he was accused of rape and stealing and got kicked out. He said he stayed there for a week because he got kicked out of the other place and didnt tell me because he knew I would worry about something going on over there but he had nowhere else to go. So knowing he lied to me about living there then telling me after he was accused, makes me think was he telling the truth about not doing it or was that just another lie? The girl wouldnt talk to me, but the ex told me that she went to the hospital and got a rape test done and it said she was raped and that they found DNA but had only 48 hours to find him to see if it was his. I dont know if thats true because I thought they would know it was him if they found it. And they could of went to his house because they knew where he was living. I'm thinking maybe he felt guilty about lying about living there, and admitted to it because they were lying about the rape? And I checked and there was no report made on it either. Anyway, would you leave him, knowing that he has lied in the past, and knowing that your pregnant struggling, and hardly get to see or talk to him? If not, how would you work it out with him, and rebuild your trust to have a happy family?Would you leave him?? Trust problems. Advice Please!!!?
You obviously know the answer -- get out as quickly as you can. It is silly for you to even have doubts about what's going on. Leave. NOW.Would you leave him?? Trust problems. Advice Please!!!?
NO don't trust him. YES leave him. You'll always be in this twisted web of lies if you live with him. Be happy in your life not tangled with questions! leave him and be happy!