I don't want my so to take a nap
Why won't you let him nap?
Because I planned to do something with him.
I can see you're annoyed that you can't do what you had planned to do with your significant other, but you really should let him rest. He probably won't be much fun anyway if he's too tired.
Nah. I let him rest for 10min and all he did was sleep.
Well what did you expect if they are tired. Do you think you could delay going out for an extra hour or so? After a nap he will feel refreshed.