There are a lot of great comments here and I want to echo so many of them and not duplicate them.

There is one thing I'd like to add:

Learning to be happy while alone takes practice - lots of it. It's not easy, but it does get easier.

Learning to enjoy being along was one of the most important moments in my life, and it changed a lot of how I see the world now. I feel like this is up there with learning self-care that works for you - equally important and yet different.