In college I had a lot of fair-weather-friends. Not because they weren't good people but because I was in a sorority and we were all forced to be friends. Granted a lot of people really did make life long friendships, and I can't knock it because one of my dearest friends was an Alpha Delta Pi with me. But I'm not a "group" kind of girl. I learned a lot during my time there, including that just because you value someone as a friend doesn't mean that they value you the same way.
You know the ones, the friend you have that no matter how much effort you put into the relationship you still get nothing back. There's another kind too, the friend that is always getting mad at you for the littlest thing. The friend that takes your own life personally and offers you judgements right and left, but then when you really need to talk all they can do is talk about themselves.
I've come to realize that it's okay to let those people go. You don't have to hold onto them. Like Generation Meh says,
"...stop martyring yourself on the altar of someone else’s indifference."
You don't have to run circles for these people. They don't make your life any better. Don't sweat the small stuff! My roommates have really tried to make my life miserable. My roommate has made her boyfriend swear that he will not share the internet they just signed up for. When I take dishes out of the sink to make room to use it I find that they have put the dishes back in, just for kicks. I realize that this is a little off the beaten path of discussion about those friends who don't want to be YOUR friend but you try to be theirs... but, for me it's the same idea. I'm not martyring myself, I'm not going to try to make things better when my attempts in the past have failed.
I'm not gonna sweat it, because it really is small stuff.
I'm taking my ball and going home.
Are there people in your life that you've had to let go? How did you feel about losing that person? Was the friendship lost because you just couldn't do the legwork anymore? Or did they push you away with their actions?