It's been two years since my last con, and there have been points of total agony because I want that experience again.
Luckily, it's really motivated me to plan out a BUNCH of new conventions to attend and cosplays to make this year. Plus I've found that researching everything I can and then sharing it with others that might also want to go has helped a lot. Getting others involved distracts me, and also makes me look forward to having an even better experience when i finally go back to a con.