Who is walking me down the aisle?

Okay so from my google searches, this question has been asked many times, but I still don’t see anything that fits me own personal situation..


I guess the easiest way to start is my biological father and I did not come in to each other’s lives until I was 18 (I am now 29) that’s a long story in and of itself but basically he didn’t know I existed and yes I have proof of that, and of him being my real father. So now over the last 11 years we are best of friends. We have a strong and genuine bond as if he were there throughout my whole life.
Now I also have a step dad from age 9 until present day and our relationship until me moving out at 18 was, to say the least, very rocky. I am the middle of 5 kids, me being my mothers only biological and my mom and step dad not having any children of their own. I never felt like one of his kids growing up, and nothing was ever done to change my perception..
As an adult our relationship has been... better. I wouldn’t say so much as to “father-daughter” but he has been there for me when I needed something fixed when I lived alone, stuff like that. I do still hold on to some of the stuff he put me through as a child. Recently he has expressed (but not to me) that it will be hard for him to watch my bio dad walk me down the aisle..
I am pretty stuck. My bio dad is absolutely going to be a part of walking me down the aisle, but what do I do about my step dad?
I should note that most of the posts I read similar to my situation were of brides having this AMAZING relationship with their step dad, or not having that great of a biological dad. I feel opposite but still also unique.
Any info would be appreciated. I am sorry this is so long, but I needed the whole picture out there (or the shortest version at least). Thanks in advance!