How to forget someone?

[RestlessTaiga]

For 8 years there's someone how constantly haunts my life, my dreams, my nightmares, and everyday is painful to remind about her, even when I think I moved on, she comes back, and she's not even in my life anymore, and the worst part is, she probably forgot about me. I need something, anything to forget, I'm seriously considering giving myself a concussion just to have a chance to forget about her, amnesia even, just, anything, it's tiring to be reminded about someone how doesn't even cara about me anymore, and even knowing this, I still care about her.