People always say, 'surround yourself with happy people if you wish to be happy,' and I couldn't agree more. If you are forever with the happiest people then you would be more optimistic and generally happier.
I am quite a sarcastic person, and I would be the first one to make a sarcastic comment in any situation, however I try to be as optimistic as possible. But the other day I was out with two of my friends and I just noticed all of a sudden how pessimistic and overly sarcastic they were. It was actually quite rude and and really ungrateful.
And then I began to evaluate whether I want to be friends with the kind of people that don't appreciate anything and that complain about nothing.