Is it safe to leave regular conditioner in your hair overnight?

I have VERY VERY VERY thick, long hair, and it reaches the middle of my back. Alot of the ends are broken, and I have tiny stubby hairs that are part of my bangs, but they are completely broken. I like to style my hair in a side sweep with my long bangs to the right, but those stubby hairs either stick straight out or up and won't grow as long as the rest of my bangs. Will leaving in a regular conditioner (SUAVE (not the proffessionals)) over night and then rinsing it out in the morning help heal my burnt hair?