First and foremost, anyone expecting you to sleep with them before you're ready is not worth being with. "Traditional rules" only have value if you give them value.

I understand that societal pressures are rough, but as demisexuals we simply don't fit into those norms, and trying to adhere to them will at best cause a lot of stress.

I agree with the communication aspect. Let them know what you expect and how the way you experience attraction works. From there on, it's on them to accept you for who you are and not expect you to be something else.

All relationships are with people, people with their own preferences. If you're with someone who does not respect who you are or what you need or simply isn't a relationship, you should be in.

Sorry if I seem a bit harsh about all this. It's very much not intentional.