I'm going through shit myself

and I feel like I just want to run far away from all the madness and never come back

The best advice I can give is just to find something productive to do with the spare time, something positive, it'll help ease your mind a bit

hell just grab a joint and take a nice long walk

just try not to stay stationary, because then you'll get bored and just start thinking about everything, which will just lead to being more upset