help me! im stuck between these two. im confused.?

i am 16 now. when i was 14, i really liked this guy. i had a secret crush on him. we both were in the same class. me and my friends and he and his friends used to hang out. but me and him did'nt talk much.we used to say hi to each other and chat with our friends and jokes togethor and we had a lot of fun. i talked a lot to all others well but i talked to him too, but i dont know i was nervous taking to him. we went camping 2 years ago before christmas and it was fun. we were totally having fun. singing, dancing, spin the bottle and stuff. and accidentally me and him had an eye contact. it was like we were looking at each other in the eyes.i looked away. and after the camp, the next thing was my dad got transfered and we moved to another city. it was emotional. leaving my best friends and the person i love.

and after 2 years...now. week ago, the guy i liked a lot joined my college. it was surprising. we recognised each other.(friendship)

and yesterday was shocking as well as surprising. he LIKES me too. he liked me 2 years ago and he still likes me. he asked me out. but i already have a boyfrend. he doesnt know i have a bf.

i have decided to break up with my bf cuz i think i like this guy more than my bf. i thinks it the right decision.i dont want to hurt both of them. i guess my bf will understand but i am not quite sure though.

i need advice. what should i do?