I think everyone goes through some uber whiney phase somewhere down the line. Just keep in mind that life has its ups and downs. There's a lot of shit that goes on when we're kids and we just don't realize it. When we're older, it's a lot easier to comprehend. It's a lot easier to realize other things, like who our friends are, who cares about us, etc. You've had this happen before (at least something this traumatic) without knowing it.
Humans synthesize happiness, though. Stick with a decision, be definite, and you will be happy. Who's happier after a year? A person who loses both legs in an accident or a person who wins the lottery? In a year, the two will be at equal points of happiness. The person who had millions of dollars will eventually get off of the high of being rich (think about like how awesome it is to get a brand new computer/game/etc). The person who lost both legs will cheer up (this was for the best, I'm still alive, I appreciate life more). It was proven by some guy at Harvard -- I had the presentation a while back, but I've lost it now. Go figure.
You can, however, look at the the good things and be proactive. This is a GREAT inspirational video:
http://glumbert.com/media/lastadviceIt's a way to look at what we do to get what we want and living proof about everything. I know a lot of people will disagree and say "Just because you do everything right doesn't mean you will get what you want." Good things happen to good people, though. In time. Just gotta keep looking up. And in the end, the only way to be ok with you is to be ok with what you do -- that's the only thing you can control.
I highly advise backing away from your 33 year old friend. If he has 15 year old daughter, then he had her when he was 18... Doesn't seem like a responsible fellow. Be proactive in everything -- don't befriend and open up to jerks. If someone is in need, be friendly and helpful, and all the like. Of course, this is if you're happy doing that kind of thing. Be ok with yourself and then everything else falls into place. Moments like this will be a momentary down, and you'll be happy with the long-term result.
Best of luck. When you figure out how to overcome this, you'll know what it'll take from now on -- ultimately you are in control of your life. But seriously -- try using your gut -- if something feels wrong/weird, it probably is -- especially with this "older friend."
--Terin