Kissed my co worker on the cheek at a non work, night out

So pretty much as the title says (and yes I am embarrassed), a group of us went for a night out and we had drinks at a club. We were all having a good time and I kissed my guy co worker on the cheek because I thought he was giving signals but he appears to just have a flirtatious personality? At least that’s what he told another co worker.

Anywho, it happened quite some time ago however I overheard him talking about it recently and I have a feeling our boss might know. Is there a possibility I could lose my job over this? We discussed it after it happened and he said it was fine completely fine and not to worry about it however not sure what to think.

It was an off the clock, non work related event