I've left work in tears 
It turns out my colleagues are having a get together tonight and I haven't been invited.
I'm friendly ish with most of them. I would say I'm nice to people and never slag people off .
One of my other colleagues , who is a total gossip and bitches about certain colleagues is going . She is also friendly ish with most of them .
I only found out because one of my colleagues asked if I'm going tonight .
I feel so hurt 
I know it's childish but I can't help it . I'm trying to think back to what I could have done .
I know it will be the topic of conversation tomorrow and I'm going to feel worse .
How do I deal with this situation ?
Frankly , I want to say fuck it and keep myself to myself but it still stings 