Not sure why you're being downvoted. I lived what you're saying. It's a reality for a lot of people.
Cheapest option at a proper restaurant: glass of water. I had times where that was the only option that I could manage, unless my friends insisted on paying for me. I'd feel bad, but they were better off and didn't mind (at least they said they didn't mind) and otherwise I might not have even gone out with them.
Splurging for me was going and getting 4 items off the dollar value menu at Wendy's instead of 2 or 3.
But it wouldn't really matter. I'd get sick, have to go to the doctor, get a bill I couldn't pay, it'd go to collections and wreck my credit, then my car would break down the same week, then it breaks down again in a different way a few months later, and will keep doing so because it's an old piece of shit but you can't get anything better, and there's just no getting ahead. Just sinking further and further into debt.
I didn't break out of that cycle until I got a job that almost doubled my salary and dedicated a couple of years to just digging myself out of the hole I had gotten myself into.
I'm a lot better off right now. Actually have savings, some investments. House, dogs, wife, spend more money than I should on stuff I don't really need. But I'm way, way behind others my age in my industry, and my credit is just okay now, not great.