What happened to all the nice guys?The answer is simple: you did.
See, if you think back, really hard, you might vaguely remember a Platonic guy pal who always seemed to want to spend time with you. He'd tag along with you when you went shopping, stop by your place for a movie when you were lonely but didn't feel like going out, or even sit there and hold you while you sobbed and told him about how horribly the (other) guy that you were with treated you.
At the time, you probably joked with your girlfriends about how he was a little puppy dog, always following you around, trying to do things to get you to pay attention to him. They probably teased you because they thought he had a crush on you. Given that his behavior was, admittedly, a little pathetic, you vehemently denied having any romantic feelings for him, and buttressed your position by claiming that you were "just friends."
Besides, he totally wasn't your type. I mean, he was a little too short, or too bald, or too fat, or too poor, or didn't know how to dress himself, or basically be or do any of the things that your tall, good-looking, fit, rich, stylish boyfriend at the time pulled off with such ease.
Eventually, your Platonic buddy drifted away, as your relationship with the boyfriend got more serious and spending time with this other guy was, admittedly, a little weird, if you weren't dating him. More time passed, and the boyfriend eventually cheated on you, or became boring, or you realized that the things that attracted you to him weren't the kinds of things that make for a good, long-term relationship. So, now, you're single again, and after having tried the bar scene for...