[Onthefence]

My ex boyfriend and I had sex and now I am pregnant. I was very drunk that night and don't remember whether I said yes or no. I want to have an abortion but he want to keep it, I am not even with him anymore so in my eyes he has no say, is this right for me to do?

[joypulv]

If you are in the US, you can still legally abort the fetus without consent from a boyfriend. Many groups are fighting for bio father rights and some states have tried to pass legislation, but as far as I know, none have yet.
I don't see how a bunch of strangers online can tell you what to do. Start with friends, maybe family if they understand, and a counselor at a local Planned Parenthood or abortion clinic (yes, they have counselors who will just listen and help you decide - they aren't there to make you decide and use their services).
Do all this ASAP - the sooner you decide, the better.
If you want to elaborate about the ex here, feel free. How does he plan to support and care for a newborn all by himself, or is he trying to get you back, or get you involved on some level, or just what is he thinking?