Accept what happened to you. Don’t fear what might have been.
Your past does not define you. Your future does.
We need to learn to forgive ourselves before we do anything else. This is why we say AstagfirUllah multiple times after prayer, even though only one sincere “I’m sorry” is enough for Allah to forgive everything. We do it so we can forgive ourselves.
Don’t just forget your past. Accept it, Forgive it and Learn from it.
وذكرهم بأيام الله
AND MOST OF ALL, NEVER EVER LET ANYBODY STOP YOU FROM GROWING AS A PERSON DUE TO YOUR PAST. NOT EVEN YOURSELF!
You are in no way obligated to be who you were five minutes ago.