<human>: I'm stressed out. Like really stressed!

Let me start with a little bit of background information. I'm a very determined person, so when I have a goal I will do whatever it takes to achieve it. After highschool my goal was to become a paramedic. 3 years later I had graduated a college medic program and been hired with the service I wanted to work for. 

This alone was quite the feat. Where I live, in Canada, there are usually ~700 people applying for 30 college spots, and about ~1000 people applying for about 24 jobs. Not to toot my own horn, but I am one of 3 people who are 21 working for a service of 300 paramedics.  Most of the other people hired were usually > 26 years old. 

Unfortunately this wasn't enough for me. After finishing college I decided I wanted to become a doctor. From there I applied to a local university to work on my degree. For the last 3.5 months I have been a full time student, while also working ~100-120 hours a month. This would be quite manageable if I didn't need ridiculous grades to get into medical school. I'm quite proud to admit that I am doing well in each of my classes. The problem is that I spend so much time working on school stuff that I am always stressed out, and as such I have become quite unpleasant and cold towards a lot of good friends who truly care about me. 

I obviously don't want this to be the case, but I'm just not sure what to do about it. Does anyone have any advice?

Condense the text into a few key points
<bot>: I spend so much time at school, doing school work, or at work that I have become cold and apathetic to my friends and family. Help?