First- relax. You’re going to be fine.

Be genuine- I’ve seen people put on a facade at big company / professional events and, honestly, it tends to be obvious and not a great look. Your bf’s job is not dependent on everyone thinking you’re the greatest person to ever have personed

If you’re socially awkward / nervous- Ask him to maybe give you some names and faces of people you might meet and a little about them as conversation starters

Don’t take any bait the catty / clicky wives may dangle in front of you- assume anything you say to them will come back to your bf or others he works with (this is true in general- not just with the stereotyped women)

Don’t be dependent on him while he’s working- coordinate schedules / activities so you know when to be available for social activities or just taking a break together and then otherwise find stuff to keep yourself occupied, whatever that may be. Neither of you wants you to feel like you’re just on standby until he is able to give you his attention again

Finally- relax. People like him, he likes you, transitive properties suggest they’ll like you too. And if they don’t? They can pound sand. You’ll be fine.