Ah, my dear woman, you are a thinker. And a worrier. In that way we are very similar. But perhaps this is one of those times you might want to give your brain a rest and just enjoy the attraction between you and Jay without worrying. As long as you're not dissing Davis in any way (and I am certain you are not), it's all good. It will likely either fizzle out, or morph into just a flirty friendship. Even if he did notice, maybe he just sees it as some fun flirty energy between the two of you and doesn't feel threatened. I would think you'd only need to tell Davis if it seemed like it was heading in a direction where the fantasies might become reality. But not every attraction goes anywhere, so give yourself a break.