Something I really need to get off my chest

So I'm sure like many of us I've had my share of bad relationships and silly crushes, but lately there just seems to be one to top it all. Even though I know I can't call whatever this is a relationship it's mostly me just being hopelessly in love with someone that can't have, though this seems to be typical from me lately but this is just different, he is just different. I won't go in to any real details about our relationship, mostly for my own pride. I will tell you this though he is pretty much everything I ever looked for in a guy, we get along really great and like almost all the same things, he has the ability to make me smile no matter what's going on or what kinda mood I'm in. I've never truly known what people meant by butterflies in your stomach until now, whenever he looks at me or smiles at me my stomach does back flips. He will always be the one person I can never say no to, he is my biggest weakness and It kills me a little inside to know that his heart will always belong to someone else. So I guess I'll just have to just be his friend and put on a smile so he won't know I'm suffering in silence.