Maybe her attitude is the result of being a female named Jeffery?(Yes, I'm kidding
)
I don't think snakes recognize faces so much, but maybe our overall shape/size and SCENT- & even the way we move? You (your family) could try putting a worn article of your clothing in with her & see if that makes her calmer, & reassured?
I kinda do think she "misses you"- she is "comforted by your familiar presence" at any rate. But a meal skipped here & there won't hurt anything & you'll be home soon anyway- I wouldn't worry.