Um...let me put it dis way, im 15 i mite be preg.?

the dude i was messin wit aint tyrin here dat i mite be. but the dude im messin wit now, i told him wat happen. he told me if i need him he will be there for me,and he will help me, and dnt care wat it takes. if im preg. he also said he support any decision i make includin an abortion.and he said if i keep my child(possibility may not be) he would take place of my child father. so my question is (if im preg.) should i keep my child(that would change my life) or have an abortion. ..i can tell my ma, but my dad i.d.k.....