How was your life going while you were living in UK without him? If it was calm and serene then you have a direction to think about going. It must have been a complicated decision to live apart and if that was more successful then maybe the 2 of you would make better co parents with lots of distance between you.
No one will fault you for leaving a cheater. Consider what you want and decide as an individual.
Your best bet is leaving that relationship you don't need to be in an abusive relationship which is verbal or physical you want to think about your child
He is a compulsive liar and has been mentally manipulating me and abusing me about my weight for quiet some time . so talking it out will only make him mad and he wouldn't ever admit it
Question him about it your best bet is talk it out and go from there