act cool??

just heard my uni friend says tat 1 of my college friend says tat py and i act very cool to him... i was so shock wen i heard this.. i'm cool?? i don think so.. i really mind this, tat's y i keep asking my uni friend who is tat college friend say me so.. my uni friend just told me he call tat guy as "weric" , but don know his real name and keep mention tat his surname is "Tan"... i was weird tat time.. almost of mr. Tan quite good relation wit me, how come ppl say i act cool all the time.. after tat, i try to found out who is tat "weric"... finally... i know d... his surname is "tham", not "tan".. tham kar kui (perhaps i didnt spell wrongly..) i keep asking y he say so, but i cant get the answer... in my memory, i just feel tat he is the only guy always keep himself alone, act cool, even ppl talk to him, he also will close the conversation as soon as possible.. then how is the acting cool?? i had try to talk wit him before... but wat his response abit impatient.. then wat should i do?? close the topic and go la.. but now.. says i act cool??? omg... i hope tat i wont be so "失败" next time.. make ppl feel like i am choosing ppl to make a friendship and ACT COOL ALL THE TIME !!!! i really care this sentences.. because i don think tat i am tat kind of person...