Hashtag Couples goals

I last wrote in June, when he came out of the wood work for the 3rd time and slept with me and then left me when I found a picture of him and the hairdresser together. She had posted about #couplegoals while he was in my bed. He had cheated on me with her, then cheated on her with me. I only found out afterwards. I’m not sure if she knows at all. 
Last weekend it was my birthday and he got in touch to tell me I looked good. I told him I can’t be his friend and to leave me alone, as he hurt me. He says it’s all in my head. 
I don’t understand why he got in touch, I was just putting the pieces of my broken life back together. He’s broken those pieces back down and I’m a mess again, questioning if he still likes me? Wants me? Or does he enjoy hurting me? Social media shows she’s still posting couple pictures. 
Half of me hates him, half of me still loves him. I want them both to feel the hurt and pain I do. 
This has gone on for too long, I want to be happy. Why did he have to get back in touch?