scared, i dont know what to do...

I'm 14 years old, and I'm afraid that I'm pregnant... I've been with my boyfriend for 3 year's.. my adoptive parents don't like him Because of his family's history, which my family has done way worse things. We had unprotected sex a while ago and I thought he put a condom on Because he usually does.. he said that he thinks I may be pregnant Because he pulled out a tiny bit late... *he pulled out even if he had a condom on.* and he said if I am he promises to stick with me through all of it. I believe him Because he always keeps his word. Plus he took care of his two little brothers and four little sisters since They were babies, he is now 17. My sister Connie Who is 51 within a couple of weeks likes him and says he's a good guy. I said I'd want to live near my sister Because me and her are real close, plus I know she would get really upset if I left. my bf said we should leave together, live still in this area or go some place else. If I don't want to then he's leaving cause me n him both know that my dad would call the police and he'd go to jail. And I told him I didn't want this baby Because I know I am not ready! Plus I can't stand screaming, crying, children. That's Why I can't babysit. I have a really bad temper that I'm still trying to control. N he said I had a couple of options. One, he will take it and raise it *he loves children and r rlly good with children* two. We can both leave and take care of it. Three. I can get an abortion but he is not going to be In the room. *when he said that I said "R u crazy?! u must be if u think i'd ever get an abortion!* and then i said four. An open adoption *though he doesnt like the idea of someone else raising his child even if he can see his son or daughter*. And i dont know what to do.... he has a full time job and he makes really good money believe it or not. He has a SUV and a truck. And he said give him two weeks he can get a house. That sounds good and all but.. I'm still scared.. What should I do?