Feeling Lost

My Gf wanted says she need some space and needs a break, I feel like I'm not good enough for her. She says she's not happy rn but we agreed we didn't want to spilt up , that we would work on our relationship, we talked for some time until she said she didn't want to talk to me for a while, I don't know what to do, I tend to get depressed and talking to her helps me to feel better about myself and happy, I want to be with her I had plans of starting a family together, the thought of losing her makes me hurt. I dont know what to do.