Im crushing on a guy and still in a relationship...is this considered cheating?

[neonlights:t]

What do I do? I have been dating this guy for almost three years and I'm a senior...i feel like i should be able to crush on other guys...but i still love him. I have told another boy he's cute and ive kinda flirted with him and i feel soooo guilty! Should i telll my bf i want a break? to experiance our senior year and then we can tell if wer made to be? i don't want to miss out...but i don't want to mess up what we have....advice please?