Im having an issue at the moment where I keep thinking about my "one" we were together for two years and split 7 months ago and now she is seeing a new guy. Only problem is but she is always on my mind and its effecting my confidence when I go out. I know its just my ego fucking with me since shes no longer around to validate me, I cut ties with her completely so it could be easier for me to heal and also because I also didnt want to be witness to her new relationship and hope I could sort my head out. But it dosent seem to be doing much good

I know I have done the right thing by cutting the ties with her, but how do I get my ego to stop giving me a hard time?

Can anyone help me out with this?