It seems to me that one cannot know for sure, BUT one can feel ...

You can say for sure on which points the person is definitely not yours. Let's start)

→ The person makes ironic remarks and justifies them with care. This emotional abuse is WRONG

→ Comparison. Says that the person in front of you with low self-esteem and is trying to assert himself at your expense.

→ Familiarity in society. If a person is rude to others, then sooner or later he will begin to be rude to you.

→ Leaves no tip in principle. It sounds funny, but as a fact. Such a person does not appreciate the work of another, and therefore cannot appreciate his own.

→ He is greedy. A greedy person will spare not only money, but also time and emotions for you. "You can't ask for a hug, you can't wait for a good word, you have to knock out a penny"

→ Slippery point, but still ... he or she lives with his / her parents if he / she is over 25. Everyone has different circumstances and we are not talking about the fact that the person is mercantile, but about the fact that if a man or woman lives with their parents Is a child. Do you want to adopt?

The list is long, but by comparing these facts, at least, you can understand whether you can build a relationship with this person or not. Can you take these components for granted and not remake the person ...