Yeah, he does feel a bit hurt - he can't comprehend how anyone could possibly skip out on seeing him for Shockwave, of all mechs. And he'd feel a bit affronted/hurt by Megatron seeing anyone else anyway, despite that he doesn't intellectually have a problem with it because 1) he knows Megatron has the right to do it and 2) deep down he knows that Megatron agrees he's the only one worthy of his sustained attentions.)