So ready to give up

I'm just so tired mentally exhausted. It never gets any easier and I don't see an end to it. I'm just going through the motions to complete my day waiting till the time I can crawl back into bed my safe haven. This is so hard on me but then I have my daughter too who depends on me. I try to be strong for her and show her that mommy can do it. That mommy's "illness" went away the dr's made me all better. She doesn't see my world come down around me every night. Or the undying loneliness and sadness that is crippling.