Am I being cocky?, How do I change?

I beat my sister's boyfriend in chess he isn't that good no offense but he made a lot of beginner mistakes as does everyone when they are a beginner, however he hasn't played chess in a decade and doesn't have the same passion for the game as me. When I say "checkmate" I can imagine it in his head sounding like "checkmate loser you suck" you know what I mean? when I tell him I ain't trying to be cocky he just said "it's okay kids your age act like that", now as far as I know I ain't acting cocky(maybe a lil) but say I am because it's clear to him that he thinks I am acting cocky, how do I change I say good game but it seems to not work and you know like good sportsmanship, but I just don't know how to change this view he has on me. Another thing is I beat my sister in chess and for like half the game for someone who probably has played like 3 times she played very solid like there were not many weak spots all her pieces were defending each other and a lot of good squares were defended. I told her after the game "good game you played well" and her boyfriend said I was acting like Magnus Carlsen like you know like Magnus telling some average person good game (even though Magnus would easily beat the average person) when in reality it wasn't like that at all, simply just said "good game you played well", he said nah I am just joking with you but it didn't seem like a joke because no one else there had no clue who Magnus Carlsen was so who was that joke for other than me and the way it sounded it just I don't know maybe I was overthinking the joke he made but it seemed like another way of him saying I am being cocky so say for the purpose of this post I am, how do I not be?

I don't think I am acting cocky but I said "maybe a lil" in my message because I just really don't know I sometimes say things that could maybe come off as cocky depending on how you interpret them but I have good self awareness and realized that could have sounded a little cocky so I been trying to be more careful with my words also I said how do I not be cocky but the main goal of this post is how do I change this cocky player view he has of me

I feel like it didn’t require that many words to get your point across but lol you… 1) why do you care what his view is on you 2) idk how to answer how to be less cocky. Just realize that although you’re decent, many players on here and irl are decent and beating your sister’s bf doesn’t really amount to much. It’s all about your tone. You can say good game and not sound like you’re impressed that someone challenged you.

@capturedarookie I don't like people in my family having bad views on me especially my sisters boyfriend who I don't know that much I don't want him to think of me as a cocky a hole

You can’t do anything to save his ego if he continues to lose against you. You could offer to coach him, that would certainly make you less cocky, right?

you both are living similar but slightly different complexes, it's almost impossible for you (both) to realize and reason with them

since you dont have to resolve this situation (you dont have to play or live together) i suggest you to keep your distance to each other, this is far more complex to solve than you imagine. things may get worse pretty quick.

Thank you for all the responses, I like playing chess with my family members it isn't so competitive I just come out with a chess board and say if anyone is up for a game, I guess I will just stop asking my sister's boyfriend to play for awhile then maybe try to return to the chessboard with him with a different vibe, and @mf410827 this isn't a complex situation he most likely isn't thinking about this at all, I don't know what bull honkey you are going on about and yeah I understand we can just quit playing, but I would like to play with him I will probably just take a small break from asking him to play come back different and keep repeating this strategy until things settle in better, and if it just keeps getting worse than it's whatever he can think what he wants🤷‍♂️

You don't have to convince him. Just stop overthinking. Nobody outside the chess world gives a sit about losing in chess. You are probably quite young, so her boyfriend will forget about this incident pretty soon (maybe he already has)

teenager psychology is not my exact branche, but still, adult psychology is based on those stages, it even goes back to childhood. So I can still spot key behaviours causing those stirs

I don't expect you to understand all those bullhonkeys as i already told you, just tried giving you a suggestion, it's always up to you to listen or.. just not.

I wish you have a good day.

Destroy him