Liars,cheaters oh my.?

So have you ever wondered if your ex is cheated on you. I know I am. I dated this douche back in 2010 in the summer time. We met, and started to date. He moved closer to where I live, and than he got kicked out of his place (staying with roomates) and asked me if he can go stay with a buddy at the time I didn't know the buddy was a female. But eventually I found out (after we broke up) okay, but anyways! He kept making up reasons on why I couldn't call. Like his friend is sleeping, or his busy or he has to go for a walk to talk to me. Tons of reasons!!! Eventually, he broke up with me.. Through a txt message, what a dick. Than a day later, I found out the person he was staying with he is now dating. He is 22 now and shes 39.. she has 3 kids 13,18,23. I was so upset at the time, but now I could care less.. But I want to see what everyone else thinks about this douche bag and if you think he was cheating on me!!!!