Ask HN: How to deal with burning through capital?

I've saved up for a while working at a big tech company and now I'm burning through my savings working on my own startup. Any time I have expenditures I feel awful, especially spending large amounts of money, but I also know these are necessary.

I think fundamentally I don't have a good perspective about money. How should I wrap my mind around this financial situation so that I can stop hesitating on spending?