What to do when cheat on but you dont want to break up with him cause you love him and he loves you a?

okay so like i live way in atl and he live in mississippi and i think he is cheating its because he lives so far thats why i think he is cheating he says im the one and all that good stuff and i kinda know tha he is chaeting and i try breaking up with him but he said no im not cheating.so i got bck with him. see me myself i think i was DUMB. WAS I DUMB OR JUST IN LOVE?