On the topic of insta-love. I think it exists. I have seen it happen. When I met my dh, I knew in the first week I would marry him. It took him a bit longer to figure that out. Twenty years later, I wonder about those decisions made by my 19 year old self. LOL. He has always been the more reasonable of the two of us.
In teen literature, I think it is annoying because I know teen girls are just waiting for love, and perhaps define themselves by getting a date to the prom, finding love in any way they can, make it a goal. In reality, it is much more beneficial not to get swept away by a hot guy (who might want to eat you) and develop personal goals first.
I hate the love being everything perception, because it isn't. Although I have read that your choice of a spouse accounts for the majority of your happiness in life. That is a heavy choice that should be considered wisely. It shouldn't, however, be the choice that defines your life.
Soapbox aside, I love the idea of a playlist for a novel. I have three boys and treasure silence, but a little music is good too. I am just too lazy to set that up when I steal some moments to write.