Science has not yet come up with ways to read other people's thoughts. It is only possible to draw conclusions based on certain manners. It is also possible to use psychological tricks.
You need to know about this not only out of idle curiosity. Often dishonest people use someone's gullibility for their own personal gain.
Experts have explained how to understand how a person feels about you.
Here are some, but quite effective psychological traps.
Testing for vulnerability
Pretend to be weak and you can even open up a little with your interlocutor.
Tell about the problem and the difficulty of solving it, and then evaluate the other person’s response to your story.
If your interlocutor listened attentively and empathized, then you can safely conclude that the person likes you.
Watch your body language
Pay attention to how a person behaves when you appear.
Conclusions can be drawn if he changes his closed posture to an open one.
Creating interference
When you are near the person whose feelings you are testing, create some minor obstacles from things - bags, cups of tea, etc.
A person who is not indifferent to you on a subconscious level will eliminate these obstacles by removing interfering objects to the side.