Treading Lightly

It seems someone at work is trying to pick a fight with me. Not like a fist fight, but more like trying to get me riled up. I've taken on a few extra responsibilities as a result of my upcoming promotion, and I'm wondering if he's just trying to challenge me. But if that were the case, I think he'd be more direct with me instead of trying to go behind my back. Also, I've had to pick up the slack in projects he's neglected, so maybe he just feels threatened. I can't really confront him about it because he outranks me (for another two weeks, at least). I've always been one to avoid conflict, and luckily, he'll be deploying next month, so I won't have to go out of my way much longer. I just hope I can hold out until then.