I need to vent

So me and my sons father who is now my ex just broke up. We moved into our new place last month and we just moved out. So he has other kids from a previous relationship which is fine me and him been together 3.5 years. So his daughter came to me and said her her mom and brothers were moving downstairs from us and when I asked him about he didnt seem as surprised as I was long story short I found out not only did he tell her to move below us but he was still seeing her and works with her I confronted him about it and of course I was crazy he lashed out on me and my daughter and I gave apartment up and me and my daughter is staying in a shelter while him his kids and kids mother is living comfortable but I refused to stay where me and my child we're being disrespected I presented him the opportunity to still be in his son life it's up to him what he does I'm not going to beg him I don't speak to him nor have I seen him since this happen but I can say my daughter father has been such a big help during this time he offered me $1000 towards a new place we haven't been together in years but he's still willing to help us out and I'm not even having his baby