u/Spezifluencer

I (22) was texting with a good friend of mine (also 22) and he decided to ask me if I still have a certain video game installed which I did, so I automatically asked him if he was interested in playing but he answered me that his coworker actually asked him to play together so he asked me to join.

Tho, suddenly when he mentioned his coworker I got so angry and frustrated that I didn´t know how to handle it properly and quickly decided to answer back with "ok". The option was either that or insulting him which ofc I wanted to avoid.

I feel so bad, completely in rage and totally nervous at the same time, but why?