In fact, if you decide nothing else today, promise yourself that if you don't have friends, find them fast. Without support and laughter, there's just not much point to it all. One of the smartest pieces of advice I learned was the value of making decisions. Sometimes you have to make decisions with a limited amount of information. Make the best you can at the time, but do not worry if the situation changes.
Sustainable joy comes through accomplishment and through self-reliance.
It comes through leadership and success. It comes in this job, not the next one, or the one after that. Joy is possible today, tomorrow and always. But you have to work at it. You will encounter many roadblocks taking care of yourself first.