I just need to vent without being judged. Sorry so long

I'm pregnant with my first, a baby girl and for most people this would be exciting but I'm depressed and I've been depressed since the very beginning. Now I'm Extremely depressed! I'm pregnant by a man who could care less about whether I or his daughter are okay. I haven't heard from him in months! My pregnancy was a complete accident and when I got pregnant I was not in a relationship with anybody but had started communicating with my ex again. When I found out I was pregnant, I told my ex immediately expecting him to walk away but he did not, he stuck around and made me extremely happy and gave me hope for happiness and love again. He talked about being her dad and how we should move in together and be a family. He said he wanted to be present at the time of birth and asked if I would give her his last name then last week everything changed and I'm not upset about the fact that he doesn't want to raise another mans baby. I'm upset because I told him that I didn't want to do anything that would potentially leave me hurt. He knew I was vulnerable and emotional and wanted someone to be there for me. I tried not to get involved emotionally but it was hard because everything was going so perfectly! I trusted him in my fragile state just to be crushed. I feel so alone and abandoned. I was already upset about her biological father not being around and now this. My feelings are so hurt and my heart is broken. I try not to cry but it's hard not to. He told me I was selfish for keeping her and not getting an abortion, that I ruined his perfect vision, that this was not supposed to be our reality. Honestly, I just thought love would be enough to get us through but I guess not. My daughters father and the man who broke my heart are 2 different people. I was never in a relationship with her biological father.