“How to deal with rejection.” A common query. I think we’re evolutionarily evolved to take rejection hard, likely because we evolved primarily in bands of somewhere between a few dozen and up to 150 people. In that environment, rejection by an attractive female could be brutal and perhaps end a guy’s reproductive career.
In the modern environment, guys who learn to overcome rejection (and overcome their natural instincts in this regard) will have a much better shot at tagging loads of chicks. This is an example of using the intellect to overcome the emotions.
High school and college are a little more like the ancestral environment, where networks matter more and cold approach pickup can be social death. In the big city environment, though, 100 rejections via cold approach pickup are a nullity in a guy’s life.