Advice needed

Maravilha
So for the past year I've been struggling with my anxiety and depression. When I'm good I'm REALLY good but the last few months I've f lot at my all time low and always sad, and depressed. It's started to effect my relationship because he feels as if I should do something to better myself. I've been feeling really insecure and shitty. I don't know because over the year a lot has changed. I've lost a lot of friends, I'm joining the navy, and I can't seem to hold my weight. I'm only 19 and all I do is go to work and then come home. What should I do ☹️☹️