You didn't ask for my (or anyone's) advice, LOL - but seriously...get it.
Here is what I am hearing over and over - yeah, doesn't seem to stop you from getting it, but if you do have the booster - you get far less sick. I personally know a number of couples who were exposed over the holidays - who are one boosted/one not - the ones boosted had a mild cough or other minor symptoms for a couple of days, and the ones who aren't boosted have been sick as a dog for a week, and multiple have had to go to the ER just to get fluids. And these are people living in the same household/sleeping in the same bed.
Yup, totally anecdotal - but I keep hearing the same story over and over.