Question about lube!

Kaylee • 25 years old, newly married :)
Do you only need to apply lube once, or do you have to keep reapplying it? I'm paranoid about the condom breaking (it has broken before when we didn't use lube.) So we end up reapplying at least once. Unfortunately sometimes that makes my boyfriend go soft because he says it's too wet so he can't feel anything. It's so annoying.