Help me, I'm caught between two guys!

I've been with my boyfriend for almost 9 months, and in love with him,
I also work with this guy I have falling for a year ago and I never really talk to him, last week he talked to me a my friends birthday party and said he single only because he's been waiting for me, and he watches me at work and he is falling in love with me !!! my feeling are coming back, my boyfriend is more then playful out going and the other guy is the more affection quiet type...I don't know what this feeling is, for once im completely caught between 2 guys.
I don't want to break up with my boyfriend for nothing but then again, and how do I no he doesn't want only my body. Yesterday when I told him im staying with my boyfriend he told his cousin one of my good friend he was crying because he like me soo much, But anyways please tell me what I should do, I dont want to hurt anyone

You need to break up with your boyfriend, its not fair to him that you have feelings for another guy and are being selfish in thinking of staying with him just incase it doesnt work wiht this other guy and you end up alone! If you have feelings for this guy you need to let your boyfriend go so you are free to do what ever you like, maybe you give this guy a chance and if if doesnt work out it just wasnt meant to be but you cannot continue being with someone when you have feelings for someone else.