How to get him to come back home

Your sister beat him and you kicked him out. consider yourself lucky that he is even talking to you.

He didn't not come back because your sister beat up on him, but because you took her side not his! Even if you didn't tell him to leave for good, you told him leave. So, you are very lucky if he gives you another chance. If you want to make an effort on this one, you need to give him time. You also need to tell him you are sorry for treating him like that, and tell him you will not do it again. You need to keep your word on this. Also, I recommend you see him somewhere else, patch things up (if he lets you) and then try to take things really slowly, bringing him back into the house. The first time he comes back, I personally think your sister should NOT be there (make sure he knows this). Also, I would say you need to have a good talk with your sister so that she behaves herself next time he comes over and she is there. Even better if you can get her to apologize so you can tell him that she's sorry that she behaved that way (before he comes back - it will be less stressful for him then). As for your child, don't use him to get this guy back.

What? I would move on and tell your Sister to quit beating your men. He is afraid and I would be to. He will come back when he is ready.

Why would your sister be beating on your boyfriend? Why do you have your son in that type of environment? This is all very confusing to read. Can you give any more information?

To answer your question though you can't make someone do something they don't want to do. You need to give him some space and not keep nagging him. Concentrate on being a good mother to your son. He needs extra attention right now too- especially if he was close enough to your boyfriend to be calling him dad. I think he's more important than some guy who doesn't have the decency to behave like an adult and tell you straight up what his feelings or intentions are. Also don't use your son as bait to guilt him back. That never turns out well.