curse of “NO”

I m doing computer engineering so im sure everyone realised by know i have too do multiple projects because well if i dont push myself no jobs thats scary so in college per sem we get multiple projects so its story of my sem 3rd we had 4/5 subjects and from them 3 subjects we had projects so groups were roll no wise 2 of my groups were same and one was different because number of members were different in this group . My group was full of guys no girls around my roll no at that time because of weather I was sick I had fever no one was helping me in the project I asked them to contribute atleast a bit no one was ready they ignored my text etc I did 2 projects alone because there was no help. I could not say anything because I’m anxious I was not able to say no and tell them I can’t do this alone so I stayed awake as we had very less days because of no help from anyone I had to this all by myself from finding the information , coding , solving errors and I had no references too and after all this I had to make report too for everyone and dividing work so they get marks too as I was not feeling good to take credits all by myself even though they did not help me at all! I did everything I was grinding myself day and night to complete the project and the work I did this for the 2 groups which were same in the third group which was a bit different because of members there was a guy he is good in studies too I thought he will me even a bit but he didn’t he told me that he is sick he can’t do this and on next day we had to submit the project and report both the project was left too and report as well! I thought he is working, he was not working at all and he asked me to do work at night around 11 am that if I can do work given to him as well I couldn’t say no because he was sick I was having high fever I was covered in blanket and it was rainy season too I wasn’t able to eat food as well my head was pounding in pain a lot but well as I said I don’t know how to say a simple word as no to someone I told him I’ll manage his work have rest take care and I started doing his work too I completed the project by 3-4 am then I started with report I did it by 6 am I guess then I wanted some sleep my college was at 9 am I was not able to take holiday because of submission i sent the report in the group in editable format and in pdf format too but this guy who asked me to do the work he later asked me even to edit his name because it was incorrect his last name he couldn’t even do this by himself looking back I realized everyone was using me for their comfort just because they can have rest and enjoy their life whereas I’m living the life like a slave or something!