I'm so sad

Some days are harder than others. I broke up with my bf of 6 years because he had a baby on me and now 3 months later I find out he's living with her. Basically playing family with her while I'm left alone with nothing. I'm so sad and he lied to me and told me he didn't live with her. If he would've been honest this would hurt way less. Just like I had to find out about the baby without him telling me I had to find out they live together without him telling me smh. I really hate him. I do.