Pregnancy without Wedlock

So I'm 23 (female) and I got pregnant and my boyfriend 25 (male), is asking me for an abortion. I have told my parents, they are open minded and totally okay with it and they are saying that the decision is upto me. They are even considering child out of wedlock and says that they will take care of me no matter what. But the issue is that my boyfriend's parents are not on board with anything, neither marriage nor support in pregnancy and my boyfriend wants me to have an abortion as he claims that he is helpless now and cannot support me so that I should get an abortion. But I don't want to do that as it's my body and my baby, I wanna keep it. I asked my bf that if he doesn't want to get involved that's okay he can step aside as me and my family will take care of the baby. But he still insist on an abortion. I have repeatedly refused him but he has this mis conception in my mind that I will somehow agree to his terms but I will not. I understand that today or tomorrow, eventually he'll be out from this situation and he will leave that's not the problem for me. My main problem is that I don't want him or his family returning back to me after the baby is born claiming rights or anything that they want me to marry him now or wanna be part of the baby's life. I want that if they choose to be out, they stay out for the rest of their lives. Kindly suggest me how can I make that possible, how can I keep them away from me for the rest of me and my baby's life?