Lyric discussion by wadems 

Cover art for Separate and Ever Deadly lyrics by Last Shadow Puppets, The

You are correct, except he saying - Save me from the sequiturs, not secateurs. Meaning, save him from the logical end. I feel he is saying he can see the relationship is ending, but doesn't want it to. Or the end of the story, where she ends up with this other guy.

Oh! I was wondering what he was doing with garden shears! That makes so much more sense.

I agree with wadems. Rather than the relationship having ended, it seems like what he's saying is that he is with this girl, but feels it's coming to an end, and that she will go back to an old lover. (Why would she care about keeping him calm if they weren't together?) "I can't help if I create a version that pulls you back into his arms", which I take to meaning they used to be together, before Alex. Also the fact that he says "that he painted you a gushing sunset and slayed angry panthers in your defence" is in...