I know that feel very much. The past couple months I've become less interested in most girls and only in rare cases will I see a girl i'd like to get it on with. Have not had any motivation to fap either. Not exactly a bad thing for me as social interactions with girls have increased ten fold as I don't feel any sexual pressure whatsoever. Life for me right now is better as I am no longer sexually frustrated but I should probably get myself checked out to see what's wrong with my sex drive even though I can still get rock hard.