at a social gathering it is really hard to tell because the two of you are not alone, you are at a place where the main purpose is to meet new people and socialize. when the two of you are alone for example eating out, walking outside, on the bus, etc. those are the moments you can tell if someone actually likes and in what way, just a friend or like as a sexual partner. im not sure if you like him or consider him as just a friend.