Advice on my relationship

(This is going to be very long) I have typed this out and deleted it idk how many times already... but here it goes, again. I have been with my fiancé for a little over a year now, at first things were absolutely perfect. I had never been so happy in my life, then we found out I was pregnant. After that, things went down hill. He has a son with the woman from his previous relationship, they were together for almost 6 years.. they decided to buy a house together, and she was caught having sex with another man in their home not even 2 weeks after buying their home. She had cheated on him before, but he decided to stay because of his son, but obviously after her caught her, they split up. Whenever she found out I was pregnant she filed for child support and got a lawyer to try an keep me from being around their son. Where we were already engaged, the court said there was nothing she could do about it. I had moved into the house they bought together (he told me it was his house only, not hers).. but I came to find out during all this, that it was in her name as well. She told the courts she wanted the house sold immediately instead of just having her name taken of it.. which left us with no where to go. We ended up moving into his dads home, at that point we were completely broke. We barely had enough money for groceries every week. After I had our daughter, he was offered a traveling construction job position as a machine operator, which he took. He asked me to come along with him so I’m a stay at home mom. Needless to say, I’m constantly stressed out, tired, and I have no social interaction at all because I’m always home. Ever since everything went down with his ex, he stopped posting about me on social media, he isn’t as affectionate as he used to be. I have to beg him to cuddle me at night, and even have to beg him to have sex with me sometimes. Any time I ask if I can buy something for myself or our daughter he either ignores me or comes up with an excuse, or just plain out tells me I don’t need it. I wouldn’t have a problem with it, and it wouldn’t bother me, but he used to constantly brag about how he bought his ex all kinds of different things.. he even put her through nursing school, paid for her books, tests and everything else that she needed. Took her on several vacations.. and constantly bragged and posted about her on social media. I literally feel like I’m undeserving of everything and anything. He still bends over backwards for her and can’t even tell her no to certain things. The day he was bringing me and our daughter home from the hospital, she had texted him about a meet up time to pick up his son, he asked if she could drop him off at his dads because he was at his “sisters” when actually he was taking us home..... I couldn’t understand why he couldn’t just tell her he had to bring us home from the hospital? When I asked he said “because I’m scared if I mentioned that she’d find a way to screw me over again”.... like seriously?!?! ITS NONE OF HER CONCERN WHEN IT COMES TO YOUR ALMOST WIFE. He has never stood up for me when it comes to her or his family. His mom made a shitty comment about me having to go to my aunts funeral and him going with me a couple months ago, and still didn’t stand up for me. He makes me feel like I’m overreacting about everything but am I? I know this is all over the place. But there is so much more I could rant about, I have no friends so this is the only place I can go to talk about these things.😭