Hi Ethan, You can say "I am in a good mood".

There are many synonyms you could use to indicate that you feel great emotionally such as: Happy Content Cheerful Joyful Jolly Carefree Untroubled In good spirits In a good mood Thrilled To name a few.

"I am in a good state" could mean financially, emotionally, work-wise, etc. It is more than a good mood. "I am in good condition" usually means physical health, and fitness. "I feel great emotionally" means they are happy, and content, and happy with their achievements/success, their relationships, etc.