Cats are trying to communicate with humans

Reading the body language of cats
Wiping the cat with you indicates that you think that you are her property.
A wet nose kiss is an emotional gesture to the cat, whereby the cat rubs her wet nose with you, and this also means that she loves you and feels comfortable being around you.
Wiping a cat's head, side, and tail at a person or animal is an act of greeting.
The playful headbutt is a sign of friendliness and affection.
Cats will smell the person's face to confirm identity based on smell intimacy.
The cat will rub its paws in a balanced way, alternating between the left and right feet, as a sign of happiness, pleasure, or fun, and clawing is also a sign that your cat knows you and trusts you.
A cat licking you is a surefire sign that she trusts you. In fact, this may be evidence that your cat considers you a part of her family just like a mother cleans her young.
If your cat tries to eat your hair, it may be that she is trying to "take care" of you. So this means that your cat really loves and trusts you.
Some cats will show that they really love you by imitating what you do. You can try this by acting out "death" on the ground. Then the cat might sniff or poke you and then act out death as well.
If your cat is biting you a little too hard, this is a warning to leave her alone.