I just want to point out that your therapist said you were codependent, but your partner dismissed it, and that made you rethink it. Think about that situation. Your partner determined something that should really be your choice- your thoughts are the ones that matter here.

Codependency is complicated and can be pretty subtle. If I were you, I would focus on learning about it and absorbing what you learn and processing it over time. Even if you don't claim the label, aspects could still be relevant and give you insights. I would say, keep going to co-anon and worry less about the label and more about what you can gain from others' experience. The label doesn't heal- you reaching for knowledge and new perspectives heals.

*hugs* Just keep swimming, just keep swimming, swimming, swimming!