I dont know what to do. Please HELP!!?

Me and my boyfriend have been together for two years. We love each other to death. He cheated on me and i forgave him.Just recently an older guy got interest in me and started talking to me.I love my boyfriend to death and i would never cheat on him. But im talking to this other guy and i feel like its cheating.I dont know what to do because my bf has cheated in the past and hurt me. The guy i just met, i really like him for some reason. He's a good guy and he thinks we go out.I dont know what to do cuz i told my bf that i would neva cheat on him but i feel like i am.My bestfriend told me to dont tell him cuz he cheated on me but i think its wrong. Can somebody please help me and tell me what to do???