This weekend, I didn't do anything, I felt so depressed, and the entire day seemed so dull and unventful. I didn't want to study nor working out, I didn't want to watch a movie or going out, I didn't want to eat nor sleep. For these reasons I was angry, I didn't know for what, I was angry that's all. I realised that, the reason of my discomfort was that the days before I stessed too much, studying too much, and doing things that I don't like to do. Stress was the cause of everything. So yesterday I went to bed early and I rested a little bit more that my usual. Today I feel better, I'm more productive and motivated. I hate when I feel of losing my time, time for me is important and I don't want waste it complaining about everything. On the other hand, I belive that I should accept days off, when my body wants to tell me that I should rest, think and relax. We are not made to work 24\7, we are also made of pleasure and joy. When you always want to be productive and efficent you can end up being depressed because you are going away from your true self.

We don't use "when one wants" it's too formal and old fashioned. We usually use "when you want..."

This weekend, I didn't do anything, I felt so depressed, and the entire day seemed so dull and uneventful. I didn't want to study or work out, I didn't want to watch a movie or go out, I didn't want to eat or sleep. For these reasons I was angry, I didn't know about what, I was angry that's all. I realised that, the reason for my discomfort was that for days before I had stressed too much, had been studying too much, and had been doing things that I don't like to do. Stress was the cause of everything. So yesterday I went to bed early and I rested a little bit more than usual. Today I feel better, I'm more productive and motivated. I hate it when I feel I've been losing my time, time for me is important and I don't want to waste it complaining about everything. On the other hand, I believe that I should take days off, when my body wants to tell me that I should rest, think and relax. We are not made to work 24\7, we are also made for pleasure and joy. When you always want to be productive and efficient you can end up being depressed because you are going away from your real being.

Doing nothing

This weekend, I didn't do anything, I felt so depressed, and the entire day seemed (so) dull and uneventful.
I didn't want to study nor working out, I didn't want to watch a movie or going out, I didn't want to eat nor sleep.
For these reasons I was angry, I didn't know [for what]/about what/why, I was angry, that's all.
I realised that, the reason of for my discomfort was that the days before I had been stessed [too much], studying too much, and doing things that I don't like (to do). Stress was the cause of everything. So yesterday I went to bed early, and I rested a little bit more than my usual.
Today I feel better, I'm more productive and motivated.
I hate [when I]/to feel [of losing]/I'm wasting (my) time, time for me is important and I don't want to waste it complaining about everything.
On the other hand, I believe that I should accept days off, when my body wants to tell me that I should rest, think and relax.
We are not made to work 24\7, we are also made of for pleasure and joy.
[When one wants]/If you always want to be [always] productive, and efficient, you ended up [to be]/getting depressed because [he is]/you are [going away from]/not being true to [his]/your real [being]/self.

A good justification for taking it easy ;  I like it !     Una buona giustificazione per andarci piano, a me piace.

This weekend, I didn't do anything, I felt so depressed, and the entire day seemed so dull and uneventful.
I didn't want to study nor did I want to work out, I didn't want to watch a movie or go out, I didn't want to eat nor sleep.
For these reasons I was angry, I didn't know for what I was angry that's all.
I realised that the reason of my discomfort was that the days before I stressed too much, studying too much, and doing things that I don't like to do. Stress was the cause of everything. So yesterday I went to bed early and I rested a little bit more than my usual.
Today I feel better, I'm more productive and motivated.
I hate when I feel of losing my time, time for me is important and I don't want waste it complaining about everything.
On the other hand, I belive that I should accept days off, when my body wants to tell me that I should rest, think and relax.
We are not made to work 24\7, we are also made for pleasure and joy.
When one wants to always be productive, and efficient, you'll end up depressed because you are going away from your real being.

The yellow is just to say that this sentence in particular is kinda weird, but good job, most of your issues were typos and punctuarion:) but do read up on verbs, bending of verbs and their relation to other words.