Should I forgive him?

He abused me. Physically & verbally, since I was a child. He didn't believe in my mental illness, he didn't understand. He drove me away, got angry when I ended up in a hospital. He never cared for the cause of the pain- he only wanted me to stop self-harming, didn't care about the suicidal thoughts and tendancies. He broke promise after promise. Burning down my family home, forcing me into constant instability. He kicked me out a few months ago for being angry that he didn't do what he had promised. He seems to be regretting it, trying to form a relationship with me. Should I forgive him? I'm absolutely wreaked, the things he has done to me has made a significant impact on my mental health, I absolutely despise him. I have frequent nightmares about him.