Did I do the right thing?

Me and this girl have been "talking" for 3 months. Been number one eachothers snaps for 2 months. She's told me everything about her, she sent me tik toks and would always tell me how special I was etc. I wanted to date her and long story short she has had bad experiences with guys and doesn't wanna date. I told her I'm sorry in a long appreciation letter and that i had to go and if she changes her mind to call me. I can't stand being just a friend any longer. We met up, hugged eachother and she gave me a little hand written note telling me how she hopes the best for me. I'm not sure if I should've hung around for months and waited for a tiny shot. Or did I do the right thing by saying if you change ur mind call me