What is the rule for using either:
'You and me'
'You and I'
in a sentence?
The confusion here might be arising because "you" is both the nominative and objective personal pronoun, whereas "I" is the nominative, and "me" is the objective.
So, You and I should take in/go to a movie some time.
He is going to take you and me to the movies.
"Between you, me and the gatepost, I think he's a gonner/is going to die." (the last part is VERY colloquial!)
However, in colloquial speech, the You and I, He and I, She and I, tends to be a bit formal. So you will hear native speakers, among friends, saying things like,
Oh, John and me/ him and me go way back (we've know each other a long time).
You and me ought to take in/go to a movie some time.
At this stage, stick with good grammar!!