How do i tell my father that my step father will be walking me down the aisle?

My mother & father split up when I was a baby. My step dad has been around since I was 4, I am now 34. My step dad has been there, bought me my first car, there for my HS graduation and threw me a party, came to my medical assisting graduation that my father didn’t come to, he came to my first wedding at the courthouse that my father “forgot” about, paid my first months rent when I moved out on my own and helped me move. When my step dad bought me a car I asked my father for a cell phone for emergencies. He said ok. Bought a used one from the thrift store that was the same as his. (Which is fine). We get to his house and his wife said “I hope that’s not for Tiffany”... he says “no, I bought it for replacement parts so I don’t need to buy a new phone” and never spoke about it again. We talk sometimes but not much at all. We see each other a couple times a year. I feel my step dad deserves to walk me alone but I have no idea how to tell my father this. I don’t want to hurt him, but he has hurt me too.