Let’s just analyze for a moment, because here we have facts why anger management is a huge issue Blaine is struggling with.

He’s been fairly calm since his outburst in the Sectionals episode, but here he’s clearly upset, and as soon as he feels himself raise his voice, the first thing he does it to assure Kurt he isn’t mad at him. But look at his hands. He knows the extent to which he can keep himself under control, and even though I’m sure Kurt has a calming effect on him, what he’s indicating with his hands is for Kurt to stay back and not touch him. 

Just saying. I can’t wait for Glee to refuse to explore this side of Blaine that is so incredibly interesting and complex and contrasts so nicely with his usual puppy dog behavior.