He mistreats you now for over two years. You say you leave him but then you always come back, and he is the same he’s always been. The chance of him becoming an upstanding man are exactly zero. Before this man there were others who mistreated and neglected you. Are you seeing a therapist? That would be definitely something to address in therapy. You don’t need to live like this. You deserve better

As about how to handle a friend like that. The only solution is not to have friends like that

Something stood out to me. You said you are “just friends”. As if bad behavior is acceptable if people are friends. Friendships are very valuable. Friends don’t treat friends like this at all. If someone treated me this way, he’d or she’d be considered like opposite of a friend! That’s another thing to address in therapy. Your view on friendships and your ways to choose friends