Did I make the right decision?

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I have a neighbor, a friend of mine who is going away to another state. He is having a really big going away party tonight with a lot of his friends and i was invited.

Gonna greentext for a bit
>Have a problem with drinking excessively
>drank so much i had to see a doctor not too long ago, my liver is elevated to the point where it physically hurts my entire chest.
>Messed up a few times and got black out drunk anyway
>Finally cut all booze 6 days ago
>Starting to go through alcohol withdrawals
>Don't feel sociable
>I feel like I am not really that fun at a party with mostly strangers unless i am drinking
>Kinda feeling lonely and isolated tonight

So i made a appearance gave him a beer, wished him the best of luck and kinda left shortly after. He was kinda bummed that I was leaving so early and i kinda feel bad. Did i make the right decision? i feel really shitty, like if I was drinking i would have gone over and made some friends but instead I left. I kinda don't wanna be around a bunch of drunk people right now though. Should i go back i am torn.