Which Guy Should I Choose?

Ok. I have a not so small problem. I'm in 6th grade, and I'm dating this guy named Anthony. He is a really great guy. By the third day of school, we were really hitting it off, and I was head over heels for him. We've been dating for two months now. I used to think that we would be together forever, but now, I think the feelings are just dying down. We barely even talk anymore. The only thing we say is a quick hi in the hall, or whats up on the phone. But there are these two other guys that I've been thinking about for a while. Lately, this guy named Will has been really helpful and nice to me. I really think I like him, but he's dating someone lse, so we both have a problem there. And then, there's Sam, who is totally flirtatious in a devilish sort of way. At our dance, he did a dance move where he reached out his right arm. While doing this, he touched my face with his finger. It was weird, yet kind of nice. He kept "accidently" running into me. He never talked to me until last Monday, and now, it's really weird, but I think he might like me. Will was talking to me the other day, and I needed help with my computer. He laid his hand on top of my hand, which was on the mouse, and helped. He smiled at me the whole time. Will and Sam both have girlfriends, and I have a boyfriend, but I don't know what to do about my boyfriend because he's done so much for me, but I want to be just friends. What do I do?