Someone who laughs all the time can be described as "jovial" or "jolly." They may also be referred to as a "laughing person" or simply as someone with a cheerful disposition. In a more informal context, you might call them a "laughaholic."
bitter
a dickweed
A chatterbox LOL
loud laughs and quiet laughs
impecunious
A best friend or a soul mate!
Party animal or party doll
That was a terrible question, because you call someone who thinks they are ill all the time a hypercondriac. So as in Jeopardy, "What do you call someone who is constantly under the impression that they are ill?" Answer: "What is an a hypercondriac?" That is correct!
you remember all the time and you think when he/she comes back or call you another time.
if a guy laughs at all your jokes and follows you its a sign he loves you
you call all those people meaners. this means your just a mean person that likes to laugh at people.
she juss wants to be friends