I totally relate. I keep my world very small - few friends, no clubs or ongoing social commitments - for this reason. After a day at work, I'm done. Even if I feel good, if I push it by doing too many things, I get manic. It's sad, and sometimes my friends are disappointed when I won't leave the house, but it is what it is. My two besties understand though, one has bipolar 1 and the other has had severe depression. They do a lot more than me socially, but they understand why I'm limited.