Do you still speak to him...??
Actually, my dad kicked me out of the house when I graduated hs and I took my weapons with me. A year later, when an opportunity to go to college arose, I took it, but I didn't want to take the guns, so I left them at my dad's house. My STEP brother was probably paying me back. We had a long running feud and the last thing I did after I was kicked out was to pound a mud hole in his face. I still have a scar on my right forearm where it hit a light bulb and broke it, putting a gash in my forearm, during one of my swings at his face.
Much later, when we had both grown up, we realized that we were both victims of a broken home. We are good friends now and communicate regularly, along with my remaining full sister. While he was a spoiled brat growing up, he realized that he was damaged as much as I was, the son of woman who left my abusive dad, but didn't want to take me. I was 7 at the time. Her last words were "shut up and go back to sleep". I never saw her again for 40 years. Her first words were "don't ask me any questions and I won't tell you any lies". It was strange meeting a woman you never really knew. After she got back on the train and went home she wrote to my older sister and said she didn't want any further contact with any of us. That was alright by me. My step mother, was a better mother to me than she was. As I told the kids my wife and I were house parents for at the children's home we lived at for three years, "you parents are the ones who raise you, not your sperm or egg donors".