We had previously met at a party a few years ago but i had never seen him since. last night i saw him at a pub. when he walked in he stood near me with his friends and stared at me on and off. after going off and getting drinks i didn't see him for a while. a bit later i was waiting for my friend and this guys friend comes up to me and starts asking me questions etc. all whilst this guy is just staring at me and is clearly more drunk. he then approached me and stood inches away from my face and didn't say anything - he was really drunk by this point - and then walked away. i really dont know what happened here. any ideas?