I don't know who I am anymore

Ever since I lost my fiancee a year ago, I lost myself. I've been so sad and scared without her. I don't know who I am anymore, I've seemed to have shut down completely. I'm not the same person and everyone can see that. It's supposed to get easier, but every day is only ever harder. I don't know what to do anymore. Life just isn't the same, never will be, and I'm exhausted. I don't enjoy anything anymore and all I want to do is lay in bed and sleep. At least she is still with me in my dreams, but I don't ever want to wake up. This is terrible, and every day is a literal nightmare. I still can't believe it