Why are guys only interested in becoming friends with benefits?

Because they don't want commitment. You have to understand that while most women are looking for commitment, most guys are thinking of how many vaginas they can conquer. Sure, there are some nice guys out there that do want commitment, but compared to the number that you want fun, is a very small number indeed. And yep, the moment you become f buddies with somebody, you're just seen as nothing more than a piece of meat.

To be honest, I would say that a good majority of guys are looking for that. And the reason is, is because so many girls WILL give it up, so guys have this idea that most girls are like that. I think that's awesome that you're not like that. And there are really nice guys out there that aren't like that. But the thing is, is that you have to be patient, because they are a little more rare then guys looking for sex.