If they are ignoring you when they get sober, they weren't worth talking to in the first place. I think I need to take my own advice, HA!
They are just acquaintances though university and my job, not friends. They are nice people but I always end up being the odd one out. I'm probably not really ignored, feeling blue makes everything seem worse than it actually is. It is just harder when you do not really have any friends anymore.