Up until the fourth sentence, I was thinking, “Let the young lady be. Let her shine.”
But kissing on your boyfriend? Excuse me!
You need to talk to your boyfriend and redraw your boundaries.
Tell him it’s rude to you and he needs to shut it down
Then next time she goes in for a kiss and he doesn’t stop her, he’s choosing her comfort over yours. That makes him the problem
Ask him why he is sacrificing your comfort for another woman.
And ask yourself if this is the kind of relationship you deserve.
You don’t want to go into the new year with this baggage.