Why do guys give up on interested woman so easily. Is it humiliating I try again just incase?

Example 1: I walked out on him cause he went soft and blocked him. I apologised days later, he ignored me, tried again a week later he ignored me now every time I’m drunk I message him to again get ignored.

example 2: I met him in a club as a one night stand. I added him on social media the next day. He didn’t add me back and ignored the requests

example 3: I met him in a club. He kissed me then Put his number in my phone. he seen me leave and kiss the guy I had a one night stand with, I seen him smiling at me and didn’t acknowledge him. i texted him the next day when sober. He ignored it. A week later I followed him on Instagram. Which he also ignored.

Why do guys give up on interested woman so easily. Is it humiliating I try again just incase?
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