You have value. We as humans don't see ourselves the way others see us. Count this guy as an experiment in discovering something about yourself you didn't know. All the things you listed are things that can and will change. And how you feel about those things...this guy helped you see some things you aren't happy with. He gave you clarity about yourself.

It's OK to grieve your marriage and wish things had been different. It's a sad reality though that not all wishes come true. Eventually, it becomes a happy reality though. You find new things to enjoy, you find new people to care about who care about you. It takes time to build a happier life. There aren't short cuts, but chocolate and satisfying experiences help along the way.