He's the same guy you've alwys known, nothing has changed. Instead of focusing on yourself , ('OMG MY FRIEND LIKES DOODS, WTF AM I GONNA DO!?'), you should think about how hated, ostricised, and alone he's feeling right now after his dad said a bunch of crap to him.
Just be there as a friend like you always have been. Sounds like he's in a rough place right now and was looking for someone he could trust to confide in. Apparently that shouldn't have been you.