Eh I'm not all that exciting or experience.
My first relationship lasted 8 months. Her dad was really strict, and did the whole stereotypical "I'm the big mean dad who's gonna glare at you whenever you're around because my girl is too good for you" routine. We were 15 and 14, and she wasn't allowed to go on actual dates at the time. A parent had to be present. So yeah, nothing too exciting.
We just generally grew further and further apart. I don't know that I ever really loved her, but I didn't have the balls to break it off, and I just sorta pretended everything would be okay. About 8 months in, she just randomly informs me [over AIM...coward] that she doesn't like me anymore. She, of course, neglected to tell me that she found some other guy. She asked him out the next day. He rejected her. Fun times
Anyway, she was a waste of my time. She was spoiled and prissy, and constantly wallowing in self-pity.
So I was single from August of '07 until July '08. My curent girlfriend [almost 4 months now] is great, and I'm genuinely happy. We did stuff together [movies, mini-golf, etc] just as friends for a few months before officially dating. I asked her out July 3rd during the fireworks show, and things have been going much, much better than my first relationship. An unlike my first girlfriend, this is someone I can actually see myself with a long time down the road. The first girl was more like "She cute, I like her, but I know it'll never work..."