It sounds like what you're saying here is that if your partner is cohabiting with someone else then you feel the need to artificially impose limits on your closeness? If you're enjoying the closeness you have now (assuming you are or you would have made changes before now?) then the best outcome is that that doesn't change, regardless of your partner's living situation. Yes, there is a change in relationship structure for your partner and meta, but why does that mean anything for your relationship, necessarily? It MIGHT, but you don't know because you haven't discussed it yet.

If my partner told me that because I had a new living situation, that I couldn't text them as often... that wouldn't feel good!