Yeah this sucks

I'm going through a break up and i'm misrable........It all started with a phonecall, my now ex's use to be friend called me saying he's fooling around with another girl. So right away I believe him since for the past few days before this happened he's been very distant with me so it made sense, right? WRONG!! I confront him with my information and he says that he's lying he would never cheat on me. We got into a fight and i ended it between us. Days later i find out that he and his friend got into a huge fight over something stupid so he thought that he could get revenge by breaking us up. Even knowing this i feel it's for the best because he start using drugs when we were together and started to yell at me soo i guess moving on is the best thing for me right now, eventhough i do feel depressed. :(