I just found out I'm pregnant but...?

I found out a few days ago that I am about 2 months pregnant. My boyfriend and I have been together for 7 1/2 years and we're not exactly rich. We did not know we were able to get pregnant without fertility treatment, because I was diagnosed with PCOS (Polycystic Ovary Syndrome) a year ago. We got pregnant unexpectedly and he freaked out. I'm not ready to be a mom because we're not financially stable and everything. He wants me to have an abortion but I am against abortion. It hurts me so much that it might kill the relationship we have just because I want to keep the baby. He thinks that benefits that I will get like WIC, SSI, and all that won't cover everything for this child. He does not want to put our child and us through tight budget. Either do I, but this is my baby. I just can't bear the thought of aborting it......just because it was an accident. I'm afraid if I do get an abortion, I won't be able to get pregnant again. ANYONE GOT AN ADVICE??! I don't know what to do!