It doesnt sound like anything against you personally to me. I think its more that you are getting there "late" and leaving early, so maybe they think your priority is the movie and not so much the socializing? Plus you sound very outgoing - maybe more outgoing than the average attendee. So am i. I think its more important - more fun, more challenging, more rewarding - to find out who i like in a group, rather than worry about who might like me.