My adult boyfriend got me pregnant

I am janice. I am 16 years old and 34 weeks pregnant. I found out about my pregnancy when I was 17 weeks pregnant. Actually I never wanted this pregnancy. My boyfriend forcefully got me pregnant. He wants to keep the baby but I don't want to keep the baby. when I told him to have my abortion he freaked out. He blackmailed me by telling me that he will tell my parents about my pregnancy. I got scared. So I didn't have an abortion. Later he admitted that he fucked me because he just wants a baby from me from the starting. So he always had sex with me.But now it is getting too hard for me to keep this baby. I don't want to go through that painful experience of giving birth. What should I do. I don't want to give birth.