Not sure what to do

I was in a relationship for 3 years, it all started out so a,aging and we were so in love. From the beginning we were just hanging out, friends, but Neither of us defined what we were. From day one we spent every evening together hanging out and at 7 months in we made things official that we were couple and from that point he stayed at my apartment every night. We would text during the day and on the very extreme rare occasion we were not together at night we would stay up late texting or talking on the phone. Everything was perfected, we got along so well and loved being around each other. Eventually we moved in together and things were still good. Sure we had arguments here and there, but we were always so committed to each other and didn’t want to lose each other. Then in April after a little over 2 years together he proposed, I was so ridiculously happy. Everything was so good. We both ended up changing jobs due to some unforeseen reasons, but saw it as an opportunity to move to a new town and start our lives together. We planned to move at the end of summer. Things were still going well, but we didn.t have the same schedules anymore, which was hard to not spend as much time as we were use to together, but things were still on track. Anytime I asked if we were ok, he always said yes. And we were still loving toward each other. August came and we moved. The weekend we moved in he had a leadership training he had to go to. I questioned it because it was Labor Day weekend, but never had any reason to not trust him and didn’t think anything out of sorts, it was more really who does training on a holiday. Then things took a complete turn. He was still working in the other town an hour away until he could transfer, so he would say he had to work late or say he was going to stay at his parents be use of his schedule. I started getting that feeling and tried so often to talk about it. We had moved, we had signed a lease, I had gone to court to get permission for my son to move with us, we were supposed to be getting married – what was going on, I was now having to beg for his time and even then he didn’t care. He would always say that he loved me the same and everything was fine. I started catching him in his lies and then mid September tracked him to a bar we always went to in a town 2 hours away and caught him with another girl. He said he was ashamed and that he was sorry and that it had only been going on for two weeks, but I just couldn’t get over it. I had never trusted someone so much and I would never have thought he was this person. We agreed to try and work things out, but there were times on his day off he went coming home when he would say. He completely forgot my birthday and then got mad at me when I was upset. This was not who I had fallen in love with. After a month and half he came home late after texting he was on his way but then wouldn’t show. I was upset and I told him. I told him it wasn’t fair that he was off doing whatever he wanted and I was there taking care of everything (the dogs, my son, cleaning, cooking, etc). He got up and packed his things and as done. A few days later we talked and he didn’t want to lose me, he wanted to try. I agreed, I loved him. He stayed with his parents and would come see me a few nights a week, but I couldn’t break the feeling. I found out he was still seeing the other girl, so just before Thanksgiving I told him hat he needed to figure out what he wanted and that I couldn’t keep being hurt. He text me a day later that he couldn’t imagine losing me and that he loved me and didn’t want us to give up. I told him it had to be different, he had to give me time, he had to stop the lies, he couldn’t keep cheating, it was him no me and that we it. He greed and promised it would be different. He would text me and come to see me a few times. We had an amazing weekend together at the beginning of December and after that he said he had been thinking of moving back in and thought if we were really going to make things work thought it was best, he just needed to figure out work. The next day he was texting weird things like he feels depressed and maybe it’s us csuing him to feel that way, but didn’t respond when I text him back. He didn’t talk to me for 2 days. So I woke up and said no more, I deserve better, I found he we at her house. Later that morning he text some lie about how he was sorry for being MIA and that he had been sleeping and had called into work. I ignored it. That morning I had signed up on bumble – not my finest moment, I mean I didn’t want to find anyone else, I just think I wanted to fee like well maybe someon will want me. He text a few hours later “so you’re done.” He found out about my bumble. I text back that he didn’t love me, he kept cheating and lieing and that I’d signed up that morning cause I deserve someone who wants me. We didn’t speak the rest of the days. That night he swiped me on bumble. I asked what he was doing and he said he thinks we are a good match, I told him we were. He said maybe we could be again one day. Then we sort of fought and then radio silence again. A few days later I sent an apology, not to get him back but because I needed to for my soul. He didn’t respond and later I found out he blocked me. I had found out he had been seeing and talking to her that whole summer before we were moving and his work trip was really a trip with her. He even went on a romantic vacation that following week after we officially broke up with her and her family. Then the next week Christmas morning I woke up to a text “you will forever be the one that got away”. I text became all he had to do was choose me and wished him and his family a Merry ChristmasWe have only spoken one time after that it was a few days after Christmas, I had to talk to him about our lease, the one he was so adamant about getting and moving, but now I was there and couldn’t afford it alone. He was so cruel and uncaring, my heart was breaking all over. I know that he’s been spending a lot of time with the other girl and that he seems very serious with her, but I’m falling apart, I never would have dreamed he was this person. What do I do. Did he ever love me? Does he really not care? Is he really in love with her? Does he think about me at all?