In her piece "A drop of love in the cloud" (2018), artist Fei Liu writes about the like/heart button as a flattening affordance of giving affirmation and love. The text-editor provides a much more expressive input.
But even people who can't communicate well because of language barriers can express love through actions, like cooking food. Can we create other "love inputs" that might allow us to "reach across the chasm of a seamless signal"?
What is expressing "real" love or affirmation about? Is it about effort, thoughtfulness, generosity, something else? What might a thoughtful or generous interface feel or behave like?
In this sense, trust is a polarizing strategy, and it's one that is important to apply early on in the relationship before someone becomes important to you. If you trust someone excessively and it goes badly, but they don't matter to you, you can just kick them to the curb. In general, trusting someone at a level that seems slightly excessive for their level of importance to you will help you sort people in your life who you want to be more important to you than they are from those who you want to be less important than they are.
And it does need to be excessive. It needs to be trust beyond reason. Not beyond all reason, but somewhat beyond what currently seems reasonable. If it is not, then unless they are prepared to take the first move, you will never find the signs you need to move to a higher level of mutual trust.
Sometimes this will go badly, but you need to be able to try bad things.