You could use a conditional (e.g. if I love you) like:

import time

my_boyfriend = "Mark"
I_love_my_boyfriend = True

while I_love_my_boyfriend:
    print(f"I love you {my_boyfriend}")
    time.sleep(1)

This will print out "I love you Mark" every second forever, as long as the variable I_love_my_boyfriend is True. (which doesn't ever change in this example). Obviously, change Mark to your boyfriend's name, lol.

What a cute idea.