I don't think this is what the song is intended to be about, but as soon as I saw the title, my brain immediately jumped to self harm.
"Razor blade, that's what I call love"
Kinda shows how you feel like hurting yourself is a solution, like it's better than love almost.
"I bet you pick it up and mess around with it"
Often how I start self harming is picking up a "harmless" object, messing around with it for a while, then next thing I know I've scratched up my whole body.
"If I put it down it gets extremely complicated"
It's hard to stop once you start.
"Anything to forget everything"
Do I even have to explain this line?