To me, I took this song as a depression/suicidal meaning. The line /your words cut deeper than a knife/ for someone with depression words feel like a razor on your wrist. /Breathe me back to life/ perhaps means that he tried to commit suicide after he could take bullying(words cut deeper) anymore. Felling like drowning is a symptom of depression, and the /lover/, lyric could be a shoutout to a blade. Needing sitches is what most people who try to cut their wrist get if they do not die. Tripping/ shaking are signs of blood loss, and kisses would be from blades, as he would be in the hospital and not able to cut. The next verse is all about how cutting distracts and makes you forget the pain with pleasure from the blood. Most people with depression also have very low self confidence, which plays into the line/your bitter heart cold to the touch/. this could be a self hate line. /Reap what i sew/ kill the stitches. /Left seeing red on my own is an obvious medfore to being angry and self harming.The bridge is about how most people get stitches and then try again until they succeed in killing themselves.