I'm thinking of not deleting nude photos of my ex-girlfriend
Why can't you let go of your ex's nudes?
I love her and I hope to find her on a dating website in a near future
An ex is an ex and you need to get over that. She probably got over you ages ago, and you need to be healthy and move on. Trying to win her back through unorthodox means comes off as creepy and stalker-like.
I know, but I feel she still thinks about me.
That is all in your head. I'm sure if she still cared about you she would've reached out by now. And if you think she does, then you should reach out to her to see what she says instead of going about it in a manipulative way.