break up??

i've been dating this guy for a year and a half now. For the last 2 months, things have been very rocky. Then a guy i've had a little crush on since middle school, dropped a bomb on me and said he's liked me for 6 years....I don't know what to do because i think i think i have feelings for this guy and just am so tired of how things have been going with my current boyfriend. HELP! what do i do?