I used to always come in to work whenever I was called in, because my first job ruled and I liked being there, and my second job didn't really give me a choice, and my third (current) job I wasn't doing anything better and needed more money. Now I live with Dos, so most of the time I would much prefer to stay home with him even if we're just both doing our own thing.
But I'm really not good at saying no, still. So eventually I gave myself the workaround of just not saying anything at all. Those texts? Didn't see em. Phone call? Phone was on silent, sorry. Even if it's a genuine emergency and I'm like "well, if I don't come in my coworkers will still have to work and they'll be miserable", I'll just go in and not bother responding so I can get a glowing thank you text with too many exclamation points. Today we were supposed to have a one hour supervisor meeting that half the supervisors were too sick to attend already, and our boss texted just me and the other supervisor who could come in to ask if we'd instead work a barista shift because someone called out. The other supervisor responded with a paragraph explaining their daily itinerary, I just started getting ready for work because I wouldn't be able to look at myself in the mirror if I came in for a meeting while the baristas were left to drown on the floor. But as I was getting ready to head out the door, I got one more text saying that the meeting was cancelled because the shift couldn't be covered, which means my boss is instead going to have to work that bullshit shift that the barista likely called off because they're in school, and always have been at this time, and shouldn't have been scheduled in the first place. And he should have to, and now I don't even have to go in to a meeting. If you aren't on call, don't answer. You don't have to.