Is he slipping back into his manipulating habits?

I was just on the phone with my bf. I spent the last 2 nights at his house. I said to him "I wish we were hanging out again tonight." He says, "Its not like u can't be" I said "well you know my dog is sick and I have to take care of him" and he says "wow, so I get treated less than an animal." and so I told him "that's not right of u to say that, why are u trying to make me feel guilty?" and he said "all u care about is urself, u don't even care about my opinion." Can you even believe that he said that? And he started going off about how everyone treats him like crap, and that no one does anything for him....My bf has always been one to twist simple conversations into irrational, hurtful arguments about things that make no sense and he knows it. He even admitted it to me once... and promised he'd never do it again. He hasn't in a long time. So, do you guys think he is slipping back into his old convo twisting, blameshifting, irrational self?