Of all the weddings I've been to, every time I go to the reception part when the broom and bride slow dance in front of everybody there is always country rock song. I'm not saying all weddings do this but why do most times they do?

I'm getting married next year, and my best friend is my maid of honor. I just gave her the date of our wedding and she's already trying to say she can't come due to college. The thing is, I gave her over a year to plan ahead (September 20,2020) she's aware she's the maid of honor, and her school is relatively close (only a few hours away). Am I allowed to be upset over this or am I overreacting? I understand she has school but missing one day, really wouldn't kill her. Especially considering she's the maid of honor, and she's close by. I also offered to pay for her gas money to get here and back. I feel like she has ample time to make plans to not be there for one day NEXT year. I'm very hurt by this and just don't know what to do. thankyou for any input, it's much appreciated.

She is coming home from a 3 week business trip and from the time she boarded the plane to when I pick her up from the train station at 7pm today, it will be 24 hours and she only got 3 hours of sleep last night. I would think that this proposal will be a bit more of a surprise, but she will be so tired. I plan to ask her to dinner... the location will be the restaurant we went to for our first date. Hoping to go on Friday. This proposal would be more expected, but she'll be all rested. She already knows that I'm planning to propose. She even picked out the ring before she went on her business trip. So which scenario sounds better for a proposal?