I Have a Story to Share

I met a guy online in January of 2015. We became instant friends until March/April he got a girlfriend whom he met online. She lives in the same state as me. Soon he became to change. I haven't heard from him for about two months (and he wouldn't respond to my messages). On June (2015) I sent him a message telling him how I was going to move to his state (how my uncles lived there). He then replied to me and I was so happy to hear from him. He tells me we can meet up when I had settle in. After moving in June, I had sent him a message about my trip and how California was so different from Missouri. But then I got bad news. He told me he wasn't going to be able to talk to me for an un-estimated amount of time, that he was going to leave social media because he has to deal with his anxiety. I told him I'll wait for him. On July (2015) I had sent him a message wishing him a happy birthday. I saw that he was online and moments later I get a message. It was from his online girlfriend telling me to stop talking to him. I told her we were only friends but she tells me he doesn't want to talk to me. She sent me a screenshot of him calling me a creep and how I had wished him a happy birthday (but he didn't click on it). It broke my heart. I never heard from him again. He had lied to me and I can't seem to delete his username from my profile. I see how he changes his profile picture and he had went to go see her. I believe he lives with her now since he is always changing his profile picture of him and her. I don't know anything else for I don't talk to either of them. It's now been a year and 5 months since I last messaged him. I had also moved back to Missouri because I was having problems in CA.
I can't seem to get over him and I pray to God I hear an answer from him as to why.