help with straights on paired boards

One of my biggest leaks seems to be overplaying straights on paired boards.

Given that you have no reads on your opponent and its heads up w/ a paired board, if you are donk betted or raised all in do you generally fold your straight?

what if a certion portion of your stack such as 1/3 is already committed?

I keep calling in these spots figuring ill see trips but everytime I get smashed in the face with a boat.