@StrayDog hit the nail on the head with his response.
Being a 28 year old, decent-looking, virgin woman who is obsessed with reading pickup advice for men is not normal. That very likely points to neurodivergence.
And given that you have almost exclusively male friends, you likely give off a masculine energy as
@Skills pointed out, which is sub-communicating non-sexual vibes to the sexually available men around you.
If I were you I would focus less on trying to understand how men think and more on cultivating your feminine side. Much as we work on our masculine fundamentals knowing that it attracts women on a subconscious level, you need to focus on developing your femininity in a way that attracts men.
You can only learn that from women, not men. So you really aren't going to gain much from this forum or reading more GirlsChase.