Your cat has his/her own way of telling you how they are feeling.
These are some of the cat signs you will recognize:
When a cat is pleased to see you, she will put her tail straight up. The ultimate in happiness is a tail bolt upright and with a little hook at the end or quivering. Her ears are erect, and her eyelids might be slightly lowered. She’ll rub her face and body against you.
Some cats are vocal. Generally the higher-pitched sounds are "happy" while lower pitched can show frustration and be more demanding. For the most part, purrs are an indication of contentment. Kitty chortles and trills--a "prrrrupttt!" sound, is a also a good indication of cat happiness. Quiet cats may express happiness with silence and vocalize more to express unhappiness.
The relaxed, contented cat may rest with front paws tucked under, ears forward, eyelids half closed. Half-closed eyes mean "I am sleepy and content." An eye-blink from across the room is a also a happy cat gesture. If she lies on her back with all four paws in the air she is very relaxed. This is also an indication that she may allow you to stroke her tummy, which is a sign of trust.
If your cat is curled up in your lap and is purring, he's probably very content. When a cat feels happy, he will often start kneading. Some very affectionate cats will put their paws around you and literally hang from your neck -- as with humans, this is just "a big hug."
A cat holding her head up is a content and confident cat. She'll show interest in her environment. She may "supervise" with a paw into everything new around the house. Or she may simply watch calmly from a distance.
A curious cat’s tail will be up and might also move a little from side to side. Ears will be erect and eyes will be wide open. Ears straight up slightly facing forward and relaxed whiskers are signs of a happy and alert cat. A stroke from you may cause her to move her whiskers slightly forward and half-close the eyes. This, with a soft purr, tells you she is a very content cat.
Kittens play nonstop and are perpetually happy. For adult cats, play is a terrific indication of happiness. As cats mature and progress into old age, play activity diminishes. But any amount of play -- from racing to wrestling, indicates happiness. Cats play with those they like and trust. When the cat lies on her side or is sitting down and the tail twitches slightly, it often means "I am interested, ready to play."
Cats who feel good keep themselves well groomed. Grooming other cats or licking humans also shows trust and a positive relationship. Cats happy with each other groom one another.