i dated a guy for quite some time, and became on good terms with his friends. we've been broken up for quite awhile now and him and i just recently lost complete communication. the problem: one of his best friends and i talk here and there, and he is throwing a party in a few weeks. i was invited to said party by his friend, the one throwing it. well another one of my ex's friends found out that i was going or was considering going, and asked me "why are you going" as if i am not allowed to be there or that i wasn't invited or what-have-you. what should i do?