Are guys ok with being "just friends"?

I've heard some guys say "a straight guy never wants to be 'just friends' with a girl" and I have read a study that says that guys very rarely have just a platonic friendship with a girl (even if the female thinks it's completely platonic).

However, the person who I consider to be my best friend is the guy who rejected me 5 years ago (then asked out one of my close friends). Ever since I stopped flirting with him, he has become more comfortable around me, and now we meet up every time we are both home from college, and have a grand ol' time (even though we don't chat/text much most of the time, every time we DO chat, or meet up, it is like we were never apart). In addition to him, I have a guy friend who I have "lunch dates" with, and people have mistaken us as a couple, but we view each other as brother/sister.

So what's the deal? Do they secretly like me? I really don't think they do, but according to stuff I've read/heard people say, guys don't hang out with girls platonically... So now I'm just confused.