Abortion shouldn't be an option. If you get multiple abortions you can destroy your cervix and possibly get breast cancer or some other form of cancer. There are many other possibilities. Or if you get an abortion again and then you get pregnant again you have an even higher chance of messing up that child. It could come out deformed or just plain messed up emotionally and mentally.
Don't use the child to keep the father. If you do that it will either scare the father away more or he will be with you but treat you poor. You don't need that.
I don't see why you couldn't just wait until you were older and in a stable relationship, etc. first before having sex. Sex isn't love it's just sex. You were well aware of what could happen if you had sex. You should deal with the consequences. Take responsibility for what you have done. Even if you use protection it's not 100% safe and everyone should know that already.
Good luck and I hope you make the right choice.
I'm not trying to be harsh (sorry if I'm appearing that way) I'm just trying to be honest.