A short message can keep a shared interest alive until there is time to enjoy it together.

Shared interests fade less from disagreement than from silence. Weeks pass, both people assume the other has moved on, and the thread quietly dies without anybody deciding to end it. A two-line message costs almost nothing and keeps the thing warm until a real evening becomes possible. It works as a placeholder, not a substitute.

Send the link, the photograph or the half-thought to the person who would care about it. Add nothing more than that, and let it hold the place until you can sit down together.