Too much for one person to deal.......

I am in a bad place in my life right now. I keep asking myself why do bad things always happen to good people? I get treated like trash and I don't understand why. It all started Friday when my ex and daughter's father came to spend time with me on my day off like we did every now and again. We enjoyed each others company as always and went out to eat before he had to go to work. He was telling me that he talked to a guy at his job and was telling him that he screwed up meaning leaving me and getting involved with this other woman. I even gave him a little money to help him get his car fixed. Well Saturday morning, he's blowing my phone up calling and texting trying to come over telling me that he broke up with his girlfriend. My thoughts are finally now we can work on getting things right with us again. So, he stays with me and everything seemed to be going well. It was like how things use to be and he kept telling me that he was happy he was with me and it felt right like nothing changed. I kept asking him if he was sure he wanted to be there and he would ask me the same. We both said yes. The last time I saw him was Thursday and we had went out to lunch after I got off work and before he went. After he got off, he calls me to tell me that he was going to stay at his dad's house that night because something was wrong with his dad's girlfriend. Later that day, I am at work and he texts me good morning then says we need to talk. He says he talked to his dad and that he was going to start staying at his dad's and wasn't going to be with anybody and was just going to work on himself. I'm thinking good for you and I was proud of him. Then I didn't hear from him after that. I texted him Sunday to say Happy Father's Day but he never texted me back. I texted him again a couple hours later asking if he was okay. Then I get a text back saying to don't contact him unless its about my daughter or this baby that I am pregnant with and that he is working things out with his girlfriend. Of course, I am completely shocked and confused. I didn't understand what was going on and I'm trying to talk to him. I call him over and over, text him trying to get answers and he wouldn't answer any of my phone calls and would only text me to tell me to stop calling him. How can you go from wanting to be with someone to treating them like dirt so fast? I was literally crying in front of my daughter which I hate that he made me do that. I still tear up thinking about it because she doesn't need to see me crying. Now I am trying to figure out what I am going to do this weekend because I do not feel comfortable with having my daughter go anywhere with him especially if he is going to be around that girl. She doesn't need to be around the mess that he caused. So I am probably going to have to call into work this weekend which I never do to be able to stay home with her because I do not want to have to explain to anybody why I don't want her to be with him right now. I just don't think its fair that I get treated this way. It hurts me so bad that someone I loved after all the crap he has put me through, the pain, the depression, would want to put someone he claims to love back in that place again. I wish he could feel how I feel and go through all the pain and heartache that he has put me through. I hate being here. I hate being sad and depressed all the time. I hate crying everyday. I cry over everything. I don't know if its my hormones or the depression but anytime anybody cries even my daughter it makes me cry. I wish he had never done this. It was only a week but that week caused alot of damage. I wish this whole thing had never happened I was fine before all this happened now I am depressed and in a bad place and don't know how to get out of it. I just pray for some kind of healing to my heart because I don't like being here. This kind of stuff makes you not want to trust guys at all because to go through stuff like this you are more better off alone than to have someone put you through so much pain that you don't know how to get out of.