Fuzzy

Fuzzy: Feeling warm, happy, or fuzzy inside. It can be used to express a sense of comfort or contentment.
Examples:
– I just hugged my pet after a long day, and now I feel all fuzzy inside.
– Watching a cute video of puppies always makes me feel so fuzzy and puts a smile on my face.

He received a surprise gift from his best friend, and it made him feel all fuzzy inside.
After a tiring day at work, she relaxed with a warm cup of tea and felt the fuzzy sensation taking over her.