I know I've had a lot of unrealistic/unreasonable expectations from most of the relationships in my life--the "good" ones and the bad. I've created a lot of my own unhappiness that way. I related a LOT to L2L's post about that.
That's a large part of the reason I am on hiatus from any intimate relationships right now. If I can't figure out how to get what I want and need from my life, on my own, I don't want to be looking for someone else to magically give it to me. I want to be able to bring something of my own to the table in my relationship with another person. Maybe someday I will be able to enjoy sharing my life with someone else, but I'm not in a place where it would be good for either one of us right now.
It's been five years since my last relationship. This is, by far, the longest time in my life I've ever been without one. From the age of sixteen, I've never gone more than a few months without one. So I never really grew up or learned who I really am.
Workin' on it, though.