I'm learning that Happiness is a lot of hard work, and a conscious decision sometimes, like a "Fake it till you make it" concept. Bottom line, however, THE GUY isn't always The Guy. Sometimes it's better to be yourself, instead of forcing yourself into a role that was only supposed to be seasonal.
They say that being old can be a burden, but being young is also very confusing at times. Always a new quandary to fathom, a new outlook to consider, new opinions to represent, and all these things have to be assimilated into your repertory so you can work with them, express them coherently. It can be a real struggle. Give yourself a chance you will come into yourself with a little effort and some thoughtful cogitation.