The MOST important thing Mike32ct learned and will share...
Keep you &*$#in mouth shut.
Don't talk about dating, pickup, which women you like or don't like, or how good or bad you are doing in this department. No bragging or complaining. Save those discussions for here on SS, NOT for in person.
The best players are the ones that keep their mouths' shut. (You might not even know or think he's a player.) Women want a guy that doesn't kiss and tell. Women want to be able to hook up with a social circle guy VERY DISCREETLY and have nobody find out.
If you are bragging about your conquests to guys or worse to girls, you are digging your own grave socially. Other girls in that group might have found you attractive and even considered hooking up with you, but once they overhead you bragging or heard gossip about you, they changed their mind because they don't want to become front page news.
(If some girl BRAGS about what a great hookup YOU were, that's fine, but play dumb anyway. Any gossip should NEVER come from you or be reinforced by you.)
Even worse is when you are struggling in this area of your life, like I was for a very long time. It becomes a "badge of honor" of sorts. You tell everybody how you have trouble meeting, dating, scoring, etc., in hopes that somebody will help you. The truth is, nobody (in person, outside of say SS) is going to help you. Men don't want competition. (Your friends that get women are probably good looking. You can't TEACH how to be tall and pretty boy, not matter what the gurus say lol.) Women want you to FAIL in this department so that group of attractive doable males remains a VALUABLE ELITE club CLOSED to new membership.
So even trying to get "tips" or advice from friends to improve your game will be leaked to girls in your social circle via gossip. People might seem nice and helpful to your face, but behind your back, you will be branded a desperate, tryhard, loser. You will have zero chance with any female in your social circle then.
What can you talk about? Work, school, your fun hobbies, maybe fun plans with your buddies. But leave out the women, sex, pickup, dating stuff. This will give the "unspoken" message that women/dating/hookups is not an issue (concern) for you, AND you are VERY discreet.
Might some people wonder if you are gay? Maybe. But I'd rather be the good looking discreet guy that women wonder about his orientation than the desperate (known) straight guy that everybody knows is struggling to get a date.
The exception to this rule is if you have a HIGHLY trusted buddy or family member you can talk to. But I'm gonna be honest to the OP. You're NOT gonna find a trusted buddy with "take to the grave" confidentiality in high school. Everything you tell a guy then, WILL be leaked to the whole school eventually. I'm not picking on young guys, just giving the likely reality.