Blood in the drain

You say you can't go any further cause you're foreign to feeling. I don't claim to be good at what I'm doing right now but i do it.
You're staying true to someone and you think it is me, but truth be told you're the only one who's blind to your denial. You see, I see you're not as thick as you think, as transparent as the broken glass in the sink. If you're really so sick of seeing this mug, why are you cutting me every time I go to pull the plug?