Having a nightmares

I couldn't sleep. Every single day. I. I just can't. Every time I closed my eyes, those memories came back to me. Haunting me. Dear God, why so hard for me to let her go? I'm trying my best to do that but still can't. Whatever I'm doing, she still stuck in my head. Please let me have a good sleep just once without dream of her. Just one night. Get me out of this zone. I'm begging you. I can't breathe. This is too much for me.