I've the immense urge to run away, although I'm just 18 years old, and in my final year of school, I feel like life asks too much of me. I've been dealing with mental health issues a lot since I got puberty, I guess before that I was also someone who didn't really had the feeling of belonging. 

Right now I'm far behind on school, and I disappoint my parents and myself? But to be honest I couldn't care less in a way, I just want to run away, to some place quiet, or to a place where I bumb into someone with the exact same idea. 
A place in a quiet forest, near springs or waterfalls, or just along a river. I just plan to sit there, as long as it takes. As long as it feels right. At least for 3 days
If I fall asleep, I'll sleep, if I'll be hungry I'll find food, just meditate, I think I'll be fine just sitting/lying there. Sense what happens within me and in my surroundings, then outside of me. 

And then I might return after that to the world, and just as I followed my intuition to run away I'll follow my intuition, what to do when I'm back, and without doubt I'll trust myself, and somehow find my alternative way. 

This sounds like a very hard but also desirable thing for me. Just being no-one for a while, no obligations, no feelings of other people. 

I'm quite the sensitive type and INFJ/INFP for those interested. 

Did people actually ran away and came back? 

I'm generally a bit confused about life and mostly myself...