You did rather suggest the most difficult solution to her problem. And you can renegotiate that, tell her you have realised that it's not fair to ask a potential interest in or by one of you that you are a package deal. And that You. Will. Date. Women. Independently. And that many have grown into this being comfortable and she can too if she does the work to get there. But you can't shield her from her feelings, it is for her to learn to process them.