There are probably three reasons why your cat keeps circling around you and rubbing against you:
1. Showing affection to its owner indicates that it likes its owner;
2. While rubbing against the pet, it keeps meowing sweetly, trying to get something from its owner, such as food or toys.
3. It wants its owner to hug it, or it wants a treat.
In short, this behavior from the cat is a friendly expression towards you.
