How to have a normal relation with a girl with whome a complication happened?

1- She has verbally abused me.
2- Her boyfriend do nt want her talk to me.
3- I proposed her when they broke up their relation.
4- I have accepted her rejection, but she broke a friendship n became stranger is hurtful to me.
5- My mind constantly seek a situation when we had a good rapport.
6- She had some misunderstanding towards me n when i tried to remove a situation became worse.
7- My mental health is in a fragile situation.
8- My age is 34 n her age is 22.
How to have a normal relation with a girl with whome a complication happened?
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