I'm pretty bad with women, first to admit. I'm trying, but people skills aren't something I was born with, and while I'm pretty well-recieved when I talk to people in the moment, I just seem to pass from their minds like a ghost without forming any close friendships the second I'm not in front of them.

One of my brothers is the complete opposite. He's got girls everywhere, a massive friend circle and seems to know everyone. He's more outgoing then me, but even as I've tried to be more outgoing it just makes people enjoy chilling with me in the moment, but not memorable at all.

It's gotten to a point where I have only a few friends and no ability to get laid and I don't know why. I'm part of a sports club, I talk to people I see regularly and am more than find striking up conversation with random people I run into. I'm not ugly and I work out regularly on top of sports so I'm pretty athletic.

I've read a lot of books on making friends and apply them (stuff like how to win friends and influence people), but more relevant here is that I've done the same with seduction and I don't seem to be able to make it work. What are some concrete steps I can do to orient myself so that I can start living life like my brother in a way I want?

TLDR: I'm very frustrated and a little depressed because my attempts to be outgoing and generate connections with people always seem to fail. Is there anything fundamental I have to change to improve my situation?