Why are the men I'm into usually gay?

As a straight girl, a close guy friend came out to me yesterday because I tried to seduce flirt with him and he had to explain why he was uncomfortable with it.

In hindsight, I've realized that most of the men I've ever crushed on end up being gay. IMO, they tend to be better looking for some reason and have more attractive personalities on average (this is completely subjective, just my preferences). I've had crushes on guys since high school and this pattern is present most of the times, I simply don't understand why.

Am I the only one like this or are there any possible explanations?

Edit: I'm not on birth control btw!