Do you think I was wrong? Are feelings wrong?

He did act a bit childish and extreme however you were wrong in what you did. I think the main lesson to this is trust, you should not be meeting young boys or any boys on a gay 'friend-finder' if you are in a monogomous relationship unless he already knew you belonged to the site. Helping out a 19 year old hottie would not go over well in any relationship. Your bf was hurt, intimidated and most likely wonders what else you have done that you haven't yet told him about. I don't think this is about money, to me it's about boundry's.