Why can't guys just be friends with a girl? Why do they always want more?

I love hanging out with guys. I get along better with males than females. I meet new guys all the time and become friends with them and everything is perfect...but then they ruin it by asking me out or confessing their non-platonic "love". Why can't guys be happy with just being friends with the opposite gender? Why does friendship always have to turn into something more with them?