If it was me, I’d approach and mention exactly that concern, flat out. Say I just wanted to put her at ease so she knows I’m not a weirdo. Keep the convo short and go back to life. Shows confidence. A real weirdo might start that conversation but use it as an excuse to chat more.
It just got to be that I’d passed up too many chances to do good and found myself neutralized in the world. I wasn’t doing bad or good. What was my life? So I started doing good in a way that put them at ease and could be easily pushed back if not welcome.