My story at College ( the university)

[Please help me to correct... This will be my final exam]

After I had passed the University examination, I started to study at the University of Technology
On The first day at school, I befriended two girls who were different than me.
One of them was tender and timid, the other taller girl was fashionable and talkative .
We could be friends because we were always sympathetic with each other whenever we got stuck.  (stuck?)
after we had finished all of the subjects of the day, we usually gathered behind the school to nosh together.
While we were noshing, we talked about everything about our classmate.
Therefore, we got closer and closer
However, a bad thing occured with us, after I had been absent from school for 1 week for attending to a trip with my family.
Before I went, I had had them take the documents from our teachers and I also advised them to catch up with the lessons so that they can tutor me as soon as I return from the trip.
And finally when I returned and asked for my documents, they said that the documents were only for the students who were present at school that day.
They would be punished, If they took it for me.
That was the reason why I couldn't take my documents after that.
Moreover, I suggested that they lend me their documents but they didn't take it with them when I really need.
The tender girl lent it to someone that forgot to give it back, the taller girl left it at home.
I was extremely disappointed with them therefore, I didn't give them gifts.
I couldn't tutor me too because they were very busy with something that I didn't know
I had to borrow the documents from others friends and stayed up late many day after that.
I regreted the time when I enjoyed my trip absolutely and based on my friends too much.
I realized that no one treated me as well as I treated myself.