I am tired of feeling alone all the time. While son's dad runs getting all women can. Then guilts me…

I am tired of feeling alone all the time. While son's dad runs getting all women can. Then guilts me for being another man and having a baby alone. He has been prison for the past 3 and half years. I tried my best to there him but I didn't a horrible job. He has gone to prison a total of 3 times in the ten years we have known each for a total of six and half years. He gets with other woman and tells it my fault. He doesn't want me, he doesn't anyone else to want me and he doesn't me to want or with someone else. I always brings up our past and we argue over the dumbest things that are little. I feel like I am starting to out grow him. He moved to Texas when he got out last month . Which is good because Vegas bad for him. He is doing with his life not looking for employment or anything. Just drinking and picking up women. I ask myself all the time what do I see him. He is such a womanizer. He says I call and text him to much. Then I told him I am not going to call or text as such anymore. Then he gets mad that I am not calling. I need to start focusing on my future build my life with my kids. I want to buy a home within the next 2 to 3 years. I am venting.