When I first saw "CB" I felt some kind of attraction, but I dismised it as a crush. Back then I was only friends with my current boyfriend "RS". With the time I came to care deeply for "RS", but my attraction to "CB" has come back to ruin my life. Worst of all, both of them are FRIENDS. And to add a cherry: Im leaving at the end of the year, and Im not into long distance relationships. So, I don't want to break up with "RS" because it would ruin the few months we have ahead of us and I really care for him like a best friend or a brother, but I also want to somehow make my feelings known to "CB" cause Im almost sure he loves me back. What do I do?

Tell them each individually how you feel. Not all breakups are bad break ups. You don't want to live a tabloid life.
Tell RS exactly what you just said,
I really care for him like a best friend or a brother that tells him exactly how you feel about him and he has the right to know. Also tell him why you're breaking up with him
Im not into long distance relationships.
Now
Tell CB how you really feel before you leave. But if you don't want anything from him (which is probably best considering the fact that they're friends and you're leaving. And you should want to leave on good terms with both of them.) make sure he knows that. Tell him the situation and how it all played out and he will understand.

Thanks, I might just do that :)

Hi dear!! My advice to you IS just keep going with the current one as you are NOT going to last with them, otherwise you will probably ruin/distruct the friendship of your friends or loose both of them in case that CB prefers not to be in trouble with his friend and he may also say( am I going to leave my friend for a lady who will even not last with me?)-and that will even be my position if I WERE CB. Thanks and be patient with your current for your remaining times in order to get honour and respect from both of them forever!!
GOOD LUCK!!

Thanks for your advice, I aprecciate it! :)