Im going out with my boyfriend but i think i like this other guy, help?

so there's this guy that i used to like but he went out with my friend but he liked me not her, but people just wanted him and my friend to be together. So then 1 year later it was so hard for me to move on but then i met this other guy and i started to like him then the first gy comes back in and told me that i was the one he liked not my friend and he said he still likes me but im already going out with the second guy. Now the first guy says he doesn't like me anymore because im going out with the second guy but the second guy doesn't know any of this. What should i do? Please help!