My Adoptive Father Doesn't Want Me Anymore

A few months ago I invited my dad to my graduation. It was the only time I ever asked him to show up, he didnt. He said he had work but my brothers later showed me that he was just in California enjoying the beach. He hasnt talked to me since but a few days ago he brought my name up during a custody disagreement in court. He demanded to have me removed as a child he has to pay child support for. Hes not my real dad, but he did legally adopt me and has been in my life since I was 2. looking back I think he only adopted me too make himself feel like he was a good person taking care of someone else's kid. now that I've stopped letting him wear me as a medal all I am is just a financial burden who he cant be bothered with. everyone says im better off without him, and i know I am, but it doesn't make me feel any less bad. And i still want him to want to be my father.