Make it fun for yourself by laughing at the differences between you and your friend. My good friend and I are polar opposites when it comes to our tastes in most things, and often when one tells the other about something she did or liked, the other will respond with a head shake and a "I don't know why we're friends." We enjoy the differences. (Ok, sometimes we enjoy making fun of them!). At her request, I made her some mug rugs for her birthday. I hate pink. But it was so much fun choosing pink fabric to use in the mug rugs because I knew it would surprise her and make her laugh that I had to work with it.
Reading this, it sounds like we're really dysfunctional and maybe shouldn't be friends, but I love her with all my heart. Even if she likes pink.