Sometimes it's nice to just stay home. I'm a major introvert (and can be somewhat of a hermit), so I feel most energized when I'm alone or with a couple of people. I like to hang out and do fun things with my friends too, but when I do, after a while, I need to take a short break to "chill out". I've been like this all my life, always needing at least a couple of hours a day of quiet time, where I can recharge my mental batteries after a long day of social activity.
Are you more of an introvert or extrovert?