Stuck in the middle

There are these two guys who are pretty good friends. Well I have feelings for both of them. One's a senior and the other a junior, but i'm only a freshman. The senior knows that I like him, but doesn't really know exactly how i feel. I wrote a letter to him, but just havne't given it to him yet. Well the other day he said something to one of my friends that just made me really think if he was really the one to like. It was not the right thing to say (now she's getting all big-headed about it) but won't even tell me what he said ( I found out from the other guy) So the junior, I've hung out with him before and I talk to him quite a bit, but I'm just afraid that maybe I like him because I'm trying to get over the senior, but because of what he said to my friend i'm just not sure that i really should like him. I do, and i know he doesn't like me but it's hard to give up on someone. The other thing is the junior, i've had people tell me that they know he likes me just by the way he acts and they know this because they know how he is and how he acts. I'd just really like to know for sure, because I think that'd help me to decide with way to go! I don't know what to do!!!!!!