One thing I got from REBT (Rational Emotive Behavioral Therapy) was that I could imagine all day long, all week long, about what another is thinking and feeling, but I don't have "proof" until the other tells me, using their own words.

When I can remember this, and I usually can, accepting this helps free me from the torment of wondering and imagining - that includes "What did I do?!" and "Are they getting ready to ditch me?!" among many.

When I don't remember right away, and I get caught up in it first, at the point I do remember, I ask myself "Where is the proof?". To get the proof I either have to wait to see how things go, or I can be direct and ask the person. Perhaps even frame it with my own concern "I'm getting the feeling that you might be upset with me, but I don't know so I'm asking. Are you upset with me?".

As I'm learning in therapy, the best tension/anxiety reliever is checking things out.