Should i end my relationship?

Me and my partner have been having problems for some time now its a tough situation as we are from different country's im from usa he from uk we live in the uk and have done for over 2 years we also have a 2 year old daughter who was born here in uk. i want to return home to usa with my child but he isnt so kean as it would mean he would get to see very little of our child. i dont have a work permit here and can not collect benefits so it would be impossible for me to stay here if we split. the problem is we have no trust for one another he is constantly going behind my back and talking to his x wife and other ex's from his past and not in a platonic way sending messages with ual content on facebook also i have found on the computer history that he was looking at gay personal ads on craigslist. we rarely have in the past 2 years we have had 3 times and a few months ago i found out i was pregnant again and he didnt want to keep the baby he made my life hell i eventually had to get a abortion because he was being so nasty about it. which i regret horribly now. im not sure what to do i feel trapped and he makes me feel terrible about splitting becuase he would barely ever get to see his daughter. we have tried counselling but it doesnt work he gets so irrate in there wanting to put all the blame on me. im at a loss and need advice