I had to avoid drinking occasions for a long time. First I'd give in at the event, later something happened where I'd make it through the event and end up drinking at home a few days later as a by product from the stress of white knuckling it.
Hang in there, it's not easy. My mind used all kinds of reasons to walk me back into a drink, I tried to learn from them so I could avoid that trap in the future.
It took a while but eventually things clicked and I've found I do actually enjoy being sober.