If I read your post right, you're 13 years old. That's a little young to be concerned about deep, abiding love. This is not to say I don't think your feelings are real. I'm sure they are. But the fact is, you haven't lived enough to know what genuine love really is. It's so much more complicated than you feel now. Trust me on this. And yes, it does hurt.
And the two boys, trust me, they're more interested in sex than love. Just a fact of life driven by their hormones. Though, of the two, it sounds to me that Kevin is the one who has genuine feelings for you as a friend. Oh, he still wants in your pants, but he cares for you as a friend. And that's a very good thing.