Feeling like my child and I have been abandoned

So for context my ex and I broke up and I broke with him first cause I felt neglected and taken for granted. I just wanted to be alone and eventually work on problems so we can move on and felt like I just needed to take a break from anything romantic and build a friendship so it can progress to a healthy relationship for our child. He always told me he never wanted to be like his father who abandoned him at the age of 10. Well right after we broke up he started dating his coworker and that’s when his behavior changed to someone I didn’t know anymore, started drinking not caring about me or my feelings and wanted me to move out and sent me and my child to live across the country to live with my parents knowing I don’t have a good relationship with them. My daughter hasn’t seen him since December of last year she’ll be 3 this year. He missed out on her big millstones from her talking to potty training. I don’t think this girl he’s with is a good person she kind of jus rubs their relationship in my face kinda like look what you don’t have and she won, I feel like as being the mother of his child I feel like he should at least defend me in a way not trying to be entitled but I’d do the same to him if it’s valid. But all I’ve received from him was a box of diapers, 150 dollars, and hand me downs from his mom. It makes me feel like he doesn’t care about our child, he doesn’t call or go out of his way to see how she is and if he does call it’s like once a month twice if anything and it breaks my heart for her. About 3 weeks ago we talked for the first time in 4 months and he was sobbing to me about how he misses the memories we’ve made, said he missed me and my daughter and was thinking of moving back to the same state to be closer to us he also apologized to me saying he feels bad that he can never send money because he doesn’t have it. I know how hard it is being on our own and paying for all the bills I understood and gave him the benefit of the doubt I thought he really wanted to try for us and give us a chance as a family and being back together for my daughter it made me happy. Come to find out 2 days after saying that he actually took a 2 week vacation with his girlfriend to Colombia to meet her friends an family. I was devastated. Felt like I was manipulated and felt so naive to believe he meant everything he told me that moment made me realize he didnt care about me or my child he could’ve used that money to come see his daughter that he allegedly misses so much that he hasn’t seen in 7 months. It genuinely broke my heart for my daughter it feels like he genuinely doesn’t care for us. I know it’s a lot to read but I need advice for anyone that’s been in a similar situation on how to move on and learning to accept this.