Problems of family life and options for their solution after meeting on a dating site

Started in June 2013. She is now 44 years old divorced with 17 year old son. Born unwanted by her parents, divorced during her childhood, she lived with her mother (and new partner + stepbrother) until she was of age, for over a dozen years she hasn’t had contact with her parents. I was 49, at the beginning of the relationship I had returned for 6 months to live as a mother, due to economic problems after 6 years as a single. Rocket start for her in love had been waiting for a companion for 10 years .. I am more lukewarm perhaps rational seeing several problems, economic in the first place, unfortunately works occasionally and very little, we live 30km away, the teenage son, a small house and more, but quarreling I yield to almost all his will, except cohabitation is east meet east worth it. But jealousies, control, distrust immediately begin in my every real or virtual social contact outside the couple, I can’t make her understand that I have a past of friends, seeing us 4/5 days a week, I don’t think I have to abandon everyone. I left her for the first time in April 2014, I come back after her insistence and feelings of guilt after 2 weeks. We start again but the methods are identical. The release in early summer 2015 but I return 3 weeks later. Another deep crisis at the end of October 2015, the release, in the meantime I resume coaching youth football (my happy island from which I had taken a sabbatical) But I miss her, I contact her after Christmas, I explain that I need my space / friends / hobbies, she is not enthusiastic about it but we leave again but the fight continues, she says she wants to be the priority, she doesn’t want the crumbs etc etc. The release in November 2016, but still back by the end of the year. As of February 20, 2017, after 10 days of constant quarrels, I leave. Now I have anxiety, resentment, sadness, a mix of exhausting moods. It is now 2 months of my silence, except for the reply to two / three of his devaluing sms. What to do?

I think the answer is in her sentence “I give in to almost everything she wants”, a sentence that would seem to indicate an unbalanced relationship where she feels submissive and tries to please her .. but when she can’t take it anymore, he blurts out and leaves her.