My best friend just recently started dating this guy, and I didn’t really know him that well, but thought he was cute. Then, gradually, as I’ve gotten to know him a little, I think I’ve started to like him.
I’m not sure if this is just jealousy because my friend got a boyfriend, or if I really do like him. I feel so bad because I don’t want guy-drama to get in the way of our friendship. I even told my friend I may like him, because I trust her that much. What should I do next?
LemonVibe 
Anything other than interupt their relationship. Seriously. Get busy so he’s not on your mind. Get a job, volunteer, join clubs, read, start a garden (I’m aware that it’s the middle of the winter – you can plant seedlings in cups on your window seal), take up crocheting, build a engine, discover the cure for cancer. Whatever it take s to make you busy and live your life the best way possible. Meanwhile while you are living that life you’ll meet people with common interests beyond significant others.
Leave it alone. It’s not worth ruining your friendship over. If you truly have strong and genuine feelings for that guy, you might even have to distance yourself. They’re in a relationship for a reason.