Say something like, "I apologize for saying you don't care about me. My feelings were hurt, but it was rude for me to say it like that. I hope we can spend more quality time together in the future."
Go ask your band director for a mouthpiece remover. If you do not have a band director, see if you can buy your own mouthpiece remover. It shouldn't cost too...
Make sure you've cleared both 100 Acre Wood and Atlantica, grab the three chests from Twilight Town, Space Paranoids, and The World That Never Was; beat the Goddess of Fate...
If he sounds like he believes you're being sincere and he has genuinely accepted your apology, no, it's not necessary. But if you have any doubt, it doesn't hurt to...
It depends on the circumstances. Polite interruptions can be handled respectfully by interjecting, “excuse me” or “pardon me” and then excuse yourself from the conversation.
Remember that she is not your responsibility. Be friends with her on your terms. What she does with the rest of her time, or her choice to not have other...