How to completely forget an ex?

We separated a while ago. I never got any closure and she immediately cut me out and blocked me and we have not spoken since the breakup. Emotionally I have moved on and I have stopped contacting her and given up hope of us getting back together. However, I think about my ex-girlfriend all the time several times a day. I truly miss her and wish somehow she could be in my life whether I want to feel this way or not. The memories are very vivid especially since we did so much together. Yet I have no choice but to move on yet the past memories and nostalgia hold me back.

How to completely forget an ex?
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