I can't even imagine the growth, personally, and in the other person to happen through all that time and to share that time together in a relationship. And then, after all that, it can end because the relationships sours? That almost black pills me on all relationships lmao
Luckily, I also can't fathom how people have trouble being with themselves. I'm grateful that I feel as though I'm my own best friend in a way. I like who I am, even with vast room for improvement, and I feel like I do a pretty good job of guiding myself through life to make it a reasonably fulfilling adventure while helping myself become a better person (mostly). From where I'm at now, working on myself and pursuing my hobbies is all I want to do. Introducing the noise of a relationship into it seems... messy.