Everything is wrong don't know how to deal with breakups

Hello Everybody, as of last February I broke up with my ex after a 6 year relationship and had a tough time coping and getting over her. As of today I feel like I am 95 percent over her which is great because I have been seeing new people.

I have been seeing this one girl for about 3 weeks but we were good friends to begin with and decided we wanted something more. We both had issues at the time and still do. I have sexual performance anxiety and she has stress and depression. Basically I couldn't get an erection from sex and she was stressed about life and past break ups and issues as well

This is the first girl in awhile I actually started to fall for since my ex. She told me today the sex was a small factor because I could not get an erection but me overwhelming her with affection and basically clingy was the biggest thing for her. She said she realized after this experience she does not want to be with anyone or in a relationship. We are good friends and she wants it to be like that and so do I and maybe down the line stuff will happen but for now I want to get over it. I feel the same as I was when I broke up with my ex but not that extreme because that was a 6 year relationship.

We are going to see each other a lot because we have the same social circle. How do i cope with this and be normal and not stress out because I actually loved her? I just want to be around her and show her that i m doing fine and I also want her to realize I am not that guy that was overwhelming and had issues.