I've had a similar problem. My studies included a lot of econ and I'm very familiar with sunk costs. I was trained to not care about them, and now I don't. Buy

I've had a similar problem. My studies included a lot of econ and I'm very familiar with sunk costs. I was trained to not care about them, and now I don't. Buy a month's worth of gym visits as a commitment mechanism, quit after the first one without regrets. Sunk costs are sunk.