Dude, one part of being a friend is to know when to back down. Look, leave your friend to deal with all his problems himself, if he make s a mistake by himself he just has himself to blame himself for, if you got on the problem then he would blame you. On the side of whether or not to introduce the girls to one another I think it's not a bad idea but you should let him do it. By the way, the decision on the abortion should be taken by the girl not by a guy who just wants to get rid of the problem. Last but not least, if your friend knew you liked the girl he should have stayed away as a sign of friendship, that right there is not being a friend.