Human nature is really weird. I can totally relate to everything you've written, and at the same time, I, as a father and husband, would love to experience a week like that really badly every now and then.
Insofar as it's possible, not taking your feelings or life seriously is the best tactic I've come to use. But I'm relatively young, so I might be wrong.
And it's pretty vacuous: so, what, don't act on chasing happiness? Feel lonely but act like it doesn't matter and do nothing? Try to exist in a psychologically-inert routine until you die? Yes. xDD Or, you know, do small things to improve things, but don't try too hard because it doesn't seem worth it.
(My exception to this would be superego, rather than id, shit like revolutionary action which has the potential to take you and everybody else into new maxima of well-being IN WHICH you otherwise try to exist in psychologically-inert routines until death -- because that's at least more meaningful than neurotically ping-ponging around for personal maxima of well-being. More return on stress investment.)
Don't make exceptions about the things that make you happy, even if you know the things that make you happy might change down the road.