Thanks for your advice. It has been annoying to listen to her criticism every single time. At the beginning she said it's not criticism but feedback and observation, but lately she has been delivering in an angry tone and it has become overbearing. The thing is if she continues with this criticism, even as a friend I don't think I can hang out with her until she changes her behavior a little.

You're right that open dating won't benefit us if the ultimate result is that we will meet other people and will break up. I think it helps only if we're trying to prolong the dating period to work on some issues, or to become ready for a relationship. If that's the case, we have to mutually agree that we both need to adjust. It seems to me that she doesn't think we need to work on the relationship.

I have more material now to talk about next time I meet with her. Thanks for your reply and providing your input!