I miss my biological father... He refuses to talk to me. I have an idea but I'm not sure it will work?

My biological father lives in Long Beach California. I live in Northeastern Kansas. I can't just go over to his house and refuse to leave. I could get his girlfriend's phone number from my aunt, his sister. Her name is Ally, his name is Micheal. My mom's name is Andrea. I live with Andrea. Micheal won't talk to me. I'm pretty sure Ally doesn't know I exist. She's motivated my dad to become a better man. He's stopped drinking in excess. He doesn't do drugs anymore. He does a lot of community service. He's a much better person, according to my aunt. I want to try reaching out again, but I'm afraid. He's told me not to talk to him ever again. I need to know if I should send Ally a message to ask her to talk to him. My aunt says she's a great person and that her and I would get along great. HELP????