Need to get this out.... Sorry

My so and I have been together for 2 1/2+years. The we moved in together a bit more than then a year ago and everything has gone down since then. I feel like he doesn't like me i try to talk to him but he says in a little and never does. We have sex maybe 2 a week or not at all. He says it's him not me. I'm at the point where I don't want to be with him anymore. Only reason why I am because of my child, not his, she loves him. But I can't be in a relationship where I feel like I'm being treated like trash. I don't know what to do anymore. Im stressed out all the time my hair is falling off. I gave him millions of chances and I feel like he thinks I'm joking. Is anyone else in this situation? What are you doing to keep calm? Please help I don't want to live like this anymore.