Help advice

So I moved out the house away from my soon to be ex husband I have provided for me and my kid since day one . I did everything I can to keep my child and his father together I’m just tired and I no longer reach out to see if he wants my baby i pretty much leave the ball in his court. I buy everything I provide everything for my child I’m the one doing all the foot work since day one. Even spending my own money to fly back and forth so my son can see him and build a relationship with his dad. I went broke many times to ensure his dad is in his life . I finally let go and don’t bother him about the relationship with my son even during this crisis he has yet to buy a box of diapers or milk or ask about our child safety or needs. He says I am keeping the baby away from him now that I no longer blow him up about our son . He has my number blocked and constantly keep threaten to take my son away from me or making smart comments like “play smart “ or “one wrong move I’m gonna take him” I’m doing all I can as a mother but he constantly makes me feel like I’m the bad guy . Any advice on how to handle him ? He is not block and do to him drinking I said he could see him with someone around him .