Hi, laur. I can't say I've been in your position, but I just wanted to be another voice of encouragement. If you just found out I would wager it's still pretty early in your pregnancy, so you have a little time to make a decision. Take that time and give yourself some space to figure it out. I'm pro-choice, but I know that for myself I couldn't have an abortion in any but possibly the most dire circumstances. However, I still don't feel like there is one right decision here for you. Look at all the options and do what feels right to you. It's great that your boyfriend is supportive, but when thinking about what to do I would advise not basing your decision on his perceived support. If you knew you might have to go it alone sometime in the future would that change things? I hope I'm not making it more difficult! I just think this is a good thing to look at.
Even when you plan to have a kid, I imagine it can be a scary thing. Give yourself time to let everything sink in and follow your intuition. We're here if you need people to talk to. Best wishes with whatever you decide to do.