I need relatoinship advice...badly.

Well I believe আপনি have just answered your own question. If he is a really good friend and আপনি don't want to ruin that, then আপনি shouldn't. Let things fall as they may. I know exactly how আপনি feel......you would like there to be something আরো because আপনি know that the two of আপনি together are right and that আপনি can be yourself with this person, but you're afraid that if আপনি ক্রুশ that line, and আপনি become আরো than friends, that আপনি can't go back and আপনি may lose one of your best friends.
I've been in the same situation. I feel if I maybe showed how I felt, things would have been different, but then I look back on everything, and I wouldn't change it because I like having my best guy friend as the friend who is always there. The crush feelings will slowly go away if আপনি let them.
If আপনি want to pursue him, just take things slowly and hint at maybe being আরো than friends. Take your time with this, especially because he won't তারিখ yet. Give things time.
The choice is yours. If আপনি want to be আরো than friends, go for it, but if আপনি want to remain friends, then that is good too. Best of luck to you! Your হৃদয় will make the right decision. :)