Making Friends?

Is it really that hard to make friends? It seems every time I ask someone if they'd like to "hang out" they're doing something else. Every time it happens, I feel as if that person dislikes me... When all I'm trying to do is be kind! I'm trying to be a friend... And what? Is it that I try too hard? I only ask every month or so, but no... They never ask back. I feel like everybody doesn't want to spend time with me. I feel so great when they say "I can't." Every. Time. I. Ask.

^ Trying not to be negative, but I had to get it off my chest... Are friends usually THAT hard to make?