Well this comes down to morals Are you a good person? First I should ask is he a good friend of yours? If the answer is yes to both of these questions, than you should have never thought about touching the girl and left it Alone. If you are not a good person and he is a good friend, well than I guess he should pick better friends because you're an ass. At least you get the girl right? He was never you're friend was he? If you're a good person, but really he's just a school friend and nothing special, than go right ahead and date the girl. That's not your issue at that point