Signs a cat dislikes another cat
1. It will ostracize it and prevent it from approaching its territory and owner. It may even wag its tail in a defiant manner, strongly resisting their arrival.
2. They will quarrel and fight, destroy each other's belongings and toys, and even make a mess of each other's cat beds.
3. If you are mean to it, you will yell at it and drive it away. 
Signs a cat likes another cat
1. First, they rub against each other. By rubbing against each other, they can transfer their scent to the other cat.
2. Spend most of the time with this cat. Cats are relatively independent animals. If it is willing to spend a lot of time with this cat, it is very likely that it likes this cat.
3. Smell each other's scent and sleep together.
4. Their calls tend to be affectionate, with a soft voice, just like when they are being affectionate with their owner.
