Here are some suggestions, Sara. They have worked for me in similar situations and saved me. They may save you too.
Keep those numbers on speed dial, and call just to say hello, even when there’s no crisis.
Take breaks to attend meetings, if you don’t find one nearby, there’re plenty online.
Pray! Every time I have prayed before going to similar situations where I thought I was going to be the only one not drinking/using, the Higher Power sent someone my way to keep me company. I’m not kidding. Happened twice. Once at a wedding after party, I overheard another guest saying to the host that he was in recovery, we ended up sticking together the entire party. And another time at a Thanksgiving weekend when I let the hosts know that I don’t drink, a family member discretely took me aside and told me she doesn’t drink either, to support someone in her family. Miracles!!!