“going through it” is a phrase commonly used by stan twitter, it’s used when something makes one soft or emotional

feeling sad

A very vague yet specific phrase usually referring to the after effects (or during effects) of partying too hard with your girl Connie (or Tina too). You can be put through it by someone acting trifiling at a party or hangout situation. Imagine yourself lost in a dark tunnel with no way out and a lot of echoes circling your head in an overwhelming fashion. That's going through it.

Used to describe someone who is having an unusual amount of drama and bad luck all at the same time. (I encountered this expression on YouTube, actual origin unknown)

A descriptive tool used to describe a person or persons who can't decide one way or a other for to long.

To go through your everyday life in a mechanical manner, as in:
waking up,
going to work,
getting back home,
watching TV,
going to sleep,
repeat.

After an amount of time, it becomes really annoying and boring.
Makes you wanna kill yourself or start using drugs.

Also, an awesome song from "Once more, with feeling".

to go through the motions - to make a feeble effort to do something; to do something insincerely or in cursory fashion; to do something because you are expected to do it and not because you want to; to do something without believing it is important