Develop empathy
Empathy is an important quality that allows you to better understand the feelings and emotions of another person. It helps to distinguish between real and imaginary sympathy, avoid illusions and destructive stickiness for relationships. It also allows you to avoid becoming an egocentric person who believes that the world revolves only around him.

The rules are simple.

If you like someone, try to explain why. Name the reason: attracted by a photo, interests, something unusual, and so on.
Try to find topics that are interesting to both of you, not just you.
Be friendly, don't try to show yourself better than you are.
Show tolerance if you are rejected. Don't try to" blow up " borders: healthy relationships can only be built on mutual respect.
If you like a person, do not make them "run" after you, so that the feelings become stronger. If he takes a step forward, do the same. If he retreats, draw conclusions and do not run after him (unless you have offended him — in this case, you must apologize).
Don't waste time on people you don't like, don't keep them "just in case". Remember that they can do the same to you.