Captain - Need help untangling feelings
I have never believed in the 'happy-ever-after' fairy tale. We all change and grow. Sometimes we grow together with our loved ones, sometimes we grow apart. It's nothing we should agonise over - it just is what is. You need other challenges in your life - don't feel bad. See if your partner is willing to try new things. If not, remain friends if you can but you need to see what else life has to offer.