I had someone text me asking if we could hang out next week, and I'd really like to, but I've been in so much pain the past few weeks that I can't really tell her yes or no.
I'm so sorry you have to deal with this. If it were me, I'd tell her I definitely want to, so let's make a plan (pj party sounds great!), but don't be mad if it turns out to be a bad day.
Like yesterday I was okay, but today I've barely made it off the couch. My insides are just excruciating. I feel like people will think I'm just being flaky
No one's going to think that, especially not a friend, I promise. You're super sweet and wouldn't just flake on people, especially not and then lie about the reasons.