Getting up and moving on?!?

ive just recently had a bit of a hiccup with a boyfriend and its now being called a day! I am devastated about it! It only lasted a few months but we did trips together, dates and all sorts and i liked him alot. Now i have the fun job of just trying to move on. To make this worse i just found out hes coming out on a mutual friends birthday night out in a few weeks which will be hard in itself! I need to pick myself up and get back into it! Help please.....