need help please.

Hi, so my and my ex boyfriend broke up wensday. I'm very hurt, but he's already with someone else. Does that mean the she was there all along? I'm still very much in love with him, he was my first everything. Which makes it 10 times harder in my opinion. The whole relashionship wasn't that great, we had good times. But since April it really went downhill fast.  I caught him in a lot of lies. And stupidly forgave him. Since we broke up I've had people calling and texting me. Telling me things such as how many girls he cheated on me with. It hurts that I have myself to him, and it was all just a game to him. I really thought he loved me, he really acted like he did. I just need some advice on how to get over him, I'm really depressed and need help. Thank you in advance😕