One of the things you should be learning from aikido is grace under pressure. This is an opportunity to practice.
If he is being physically abusive, then yes, you absolutely should discuss it with an instructor. At 7 months in, there's plenty that senior students can dish out that you shouldn't be expected to handle.
But verbal nastiness? Meh. Shut up and train.
He gets physical when he can't "get me down" as my sensei likes to say. Apparently I'm really sensitive to intent, and if there isn't enough of it, it doesn't work. He usually ends up royally frustrated whenever he works with me. Thank you for the advice.