Cut & Paste from a Nerve advice column:

...love can be fleeting and transient. For a ... relationship, I try to keep a sense of humor and not get depressed if I try my best and it doesn't work out.

There are so many good and wonderful people in the world. Why do we get involved with people who won't communicate or who are unkind to us? People don't want to be happy, they want to be comfortable, and we're most comfortable in familiar situations, even if they're painful. When you get involved with someone ask yourself: "If this person doesn't change at all in a year, will I still want to be with them?" If the answer is no, get your head out of your ass and move on.