I went through the same thing. Except, the guy asked me out and he was a womanizer.

Anyway, my friend liked him too, and I dated him in a week, because I have a really bad problem about never saying "no". So, my friend hated me the whole week, then she realized she was being stupid in liking him in the first place.

So, my advice is (obvously) listen to your heart. If you really think it's wrong to do that, then there are boys in other schools you could date.

I hope I helped.