How to get over a broken heart

First let me thank you guys for your support. I am really trying to deal with this whole betrayal thing with my baby daddy having a girlfriend i knew nothing about while we were kinda half ass together. I'm not mad at the fact he has a girlfriend, I pissed he was having sex with the both us and when the truth came out, he lied to her and me and started to believe his own lies. It hurt my feelings that someone I considered a best friend and my family would be so doggish, selfish, inconsiderate, unloyal and now you in a new relationship doing the exact same thing but trying to save face. I don't believe all mean are dogs and liars, I believe it is a character flaw of each individual and you either are upstanding and have morals or you don't. This man unfortunately is one of them and now I have to raise our son to not be like him, to honor and treat people who you care about, be honest and let people make their own conclusion, and have loyalty with the ones that are loyal to you and don't jeopardize your integrity for nothing. I learned many lessons here, the most important is don't allow other people actions damage your heart.