My family situation in a nutshell. Please read, what do I do?

I'll brief this down as there's ALOT.

I'm still legally married to my ex who I married 4 years ago, shortly after I found out I'm pregnant. My husband got more abusive and so I had to leave.

We live in different countries and I've been a single mother to our child all this time, my ex hasnt come to see our kid nor has he paid child support. Every time I've been left short of money I've had to ask him for some and tell him what I'll spend it on, he's ONLY JUST sent me one payment and though I'm not complaining.. It wasn't much considering his wage. I'm never about money though.

He has a new girlfriend and she has her own kids who he is now an acting father figure to them. Me and my ex are now on talking terms but not fully, he has already cheated on his girlfriend twice without her knowing.

His family all abandoned him after finding out how he treated me and they speak to me and say that im seen as their family, not his new girlfriend and that they don't care about her only me and my child which is good. They've even offered to do a character reference on my ex if he tries to get nasty considering custody. Appealing he is a bad father figure with lots of stats to show.

I'm doing this all alone, my family said if I ever speak to him after my child is born then they'll leave me and they would take my kid away.. Which legally they can't do but they threatened it so I'm here not knowing what to do or where to go from here.

Do I stop trying to make the effort with my kids father or keep trying? I'm the first in the family to be a single parent. I can't discuss this with my family that's why I'm on here