The adjective gregarious means someone who enjoys being with other people.
Synonyms are friendly, affable, sociable, or outgoing.
The word origins from Latin (1660s) gregarius meaning “pertaining to a flock, of the herd, of the common sort, common”, and grex meaning “flock, herd”.
The gregarious dolphins followed their boat.
Gregarious animals typically live in large groups.
She’s gregarious at heart so it’s not surprising many people like her.