why do birds fly?

and why do some boys act the way they do? i always yearn for answers to questions that are hard to find. with that said i feel this way because of this...
i had a conversation with one of my friends early this morning, and he has been one of my good friends throughout the years. Yeah we don't hangout or we barely have conversations. but it's that kind of friendship that you can always just stop and continue on again when the time permits. before I rant on, i'm going to add a little background because honestly, i'm upset with his actions... he has been with his gf for a few yesrs already. and he loves her she loves him. BUT (because there always has to be a but) lately he's been putting himself in situations that he shouldn't be in. like hanging out with a girl that he himself admitted he has a crush on?!? first of all WHY ARE YOU CRUSHING ON GIRLS when you have a gf? and second of all why are you hanging out with the girl you have a crush on past midnight in classrooms talking about sex? then here you are telling me that you HAD to look away from the girl because you were oh so tempted!! if you want to be able to go out have fun, yet still be with your girl. don't talk the way you do to other girls. but if you don't want to change that... maybe you shouldn't be in the relationship you are in just yet. it's unfair for her.

and here i go...
I get mad at simple things my guy friends tell me when they clearly know i have a bf or i get upset to see what they do behind their gf's backs. They have absolutely amazing gfs that care about them and love them. i figure maybe they don't deserve them? maybe they're just not ready. or maybe they just need to realize.

I take things and analyze it. try to understand it. and when i can't... that's when i question.