Try my best to move on

I don't know. I feel stuck. I loved this girl to death. One day she just said that she doesn't feel like we belong together. 'Can we stay friends?'
How can you possibly stay friends with a girl that you were planning to marry and spend the rest of your life with?
I'm looking around and everything reminds me of her. I wanted to find a new place and move out but I can't make myself look for something new. This place holds so many memories that I guess now only important to me.
Let's say that that was the goal here