I’m not sure this is in the right place and i dont write much but I dont know what to do right now.
Basically i have a 1 1/2 yr old son with my ex, who im on speaking terms with, but he’s just got back with his emotionally abusive gf. He’s just using her for money cus UC messed up and assumed she was my son’s mum and she had him so gave her all the money so my ex didn’t have anything to pay bills or buy food. He told me he got her to give him the money before he got back with her, so she either didn’t give it all to him, cus she gave the condition to give him to money only if she can see my son 
, or it just wasn’t enough for all his bills and stuff.
I told him he should’ve come to me before anyone if he’s struggling, I have a big family and they would all do what they can to help, but he didnt. He just went behind my back and let her back into my son’s life without telling me, even though i begged him not to. But I don’t know how to handle the situation. I’m technically homeless and staying with my bf and his house isn really suitable for a child so i cant just take my son so i know he’s safe, and I don’t want social services involved in case they take him away. I just dont know what else i could do. 