This is really embarrassing. Best fiend... issue?

So. I have a best friend. Let's call him Sam. Sam is... a pretty huge part of my life, obviously. He's... he's the most amazing person anyone could ever meet and I honestly feel sorry for the people who don't know him. And I guess that's part of the problem. I'm... for lack of a better phrase... in love with him. And that's bad. Maybe. I don't really know.

We met as freshman through a mutual friend but we didn't really get a chance to talk (at all) until sophomore year and we had two classes together. One of them constantly had partner projects so we just went with it. By the time second semester started we had already decided we liked to talk to one another, so we did. Every morning and chance we got during class. Waving was a common occurrence in the halls. I hesitate to label anyone as a friend but we just... clicked. When Junior year started, we didn't have classes together, but we still met up at my locker, between classes and before I grabbed the bus. Neither of us really like technology, so there was never really more than that. I thought we were just really good friends. I mean... duh, but I was writing him a letter for his yearbook cuz I knew I wasn't gonna be able to write everything in 5 mins and I just realized that I love him THAT way. I've been fiddling with that for a month now and I'm more nervous than anything, but 2 days ago we had an hour long phone conversation and... I can't lose him. Which means I may not get to have him. Which is worse? What do I do?!