When it comes to appreciating life, I always think about what it actually takes to be alive.
Think about it. Trillions of cells working together to keep you alive. An immune system constantly defending you from anything and everything, even yourself. The amount of work it takes to live is extraordinary and we don't even notice it. Life is extremely fragile and short. Every one of us was gifted a very short amount of time on this wild roller coaster we call life. To me that's something to celebrate.
If you like pop culture and divas and whatnot, that's awesome! Being passionate about something is great!
Truth is, I don't have any good advice, really. I get where you're coming from and I feel similar sometimes. Even at times when I feel really down, though, I like to stay up on a night with a clear sky, look at the stars and remind myself of how tiny our planet is. How tiny we are. How huge the cosmos is and how grateful I am for this tiny but bit of time that I get to spend on this Earth, however long it may be.
While I'm at it, I may as well recommend the Kurzgesagt YouTube channel. It has some great videos on loneliness, gratefulness and stuff like that. Their book "Immune" also really gave me a whole new sense of appreciation for my body and life itself.
Good luck and never be uncomfortable because of who you are and what you like. Our time here is too short to be wasted on nonsense like that.