Like the title suggests.

I don't believe in LDR like most of you, so I made it clear to her I don't expect anything besides keeping in touch sometimes. I want to keep the prospect of sex in the future when she returns (won't be soon, maybe like 2 years)

She thinks we are in a relationship (we're not), insisted that we have some sort of LDR and keeps sending me messages, got upset I don't reply frequently.

Do I break the plate now and get in touch with her when she returns? Or do I give her some breadcrumbs here and there to keep her interest? I think the second option is quite difficult considering the distance and that she would undoubtedly meet other men. I don't want to have bad blood between us either, which makes the future possibility of sex more difficult.

What do you think I should do in this situation? Many thanks