I doubt he is with someone but even if he is?If he’s with someone else that fast, it has zero meaning. You could be with someone too. That one bozo from college or this dude, someone else’s boyfriend. It doesn’t take much to be with someone else especially if people partake in bar scenes. It takes no particular effort but also means nothing. If he already met someone and he’s not even divorced, it’s likely no good, stupid and useless. You should rejoice that you have smarts not to get hooked up with anyone right now. I’d not worry what’s he doing