How long does it take to feel normal again?

Apologies for the vulnerability and weakness beforehand.

Currently in my no contact phase from my ex who i am still madly in love with. But gotta hold on to keep what's left of my self respect.

I can't sleep, eat, work, function or sit with people right now. And i keep thinking about what I'm gonna say when/if she ever texts, which tbh I doubt she will.

How long does it last until I'm normal again? Does it ever go away?

What if I start functioning again but just enough to get by and i become so depressed and in auto pilot just wait forever if she might come back.

Because I badly still want her to come back and it's like I'm just waiting for something to happen.