That commute is killing you. So is the perception that you aren't doing anything if you aren't doing something all of the time. Give yourself a break. Everyone needs to have an outlet and video games happen to be on the lower end of the scale in terms of harmful outlets. Now you just need to forgive yourself for being human.

If you are intent on removing video games from your life, please replace it with something that allows you to free your mind. Join or start a meetup for something fun and attend it during your usual video game time. Go to your local pool and take a swim. Do anything that will take your mind off of your crappy commute, job, and MSc.

And go talk to someone if you feel you might be depressed. Good luck!