You cut the sentence in the middle: "though individuals who had received at least one dose of a COVID-19 vaccine continued to be less likely to test positive for COVID-19, regardless of variant." Which does not mean the unvaccinated are more likely to get omicron like you originally claimed. Just that if they are infected it is more likely to be omicron. Which means the vaccine is less effective against omicron than other variants, which we already know.
There are people (who keep this stuff confidential) to talk to though. You have to pay them and it can be difficult to find one that just doesn't want to blame the past instead of helping you move forward. But these people do exist and are helpful. I suggest finding someone who knows something about cognitive behavioral therapy.
I agree with a sibling comment here that it is vital to talk through these things. If you can't trust your friends, first find someone else to talk to and then find some new friends.