Hello Spaceyogurt, and a warm welcome to the forums.
When someone is suffering from any type of depression, we may try and organise ourselves to give us some sort of motivation, unfortunately, at times we aren't able to become satisfied, it's not by want of trying, but in our heart, there doesn't seem to be light at the end of the tunnel, there is though and it's what other people think, it's how you actually feel that's important.
It really does matter that you see a doctor, don't we call a plumber if the kitchen tap has broken and flooded the floor and don't we ring someone to do a favour for us, yes, so that's what you should do, ring and make an appointment to speak to your doctor, write down on some paper how you are feeling and hand it over to them, this makes it so much easier than trying to answer a question they ask 'how can I help you'.
From what you have told us, there is so much you want to talk about, and loss of wanting to continue your studies and no interest in hobbies indicates, although I'm not qualified to say, experience tells me that these negative thoughts need to be discussed.
Ask the doctor about the 'mental health plan', which gives you a Medicare rebate for approximately 6-10 sessions per year to see a psych.
If you are under 26 years of age, then you can also talk with Kids Helpline 1800 55 1800 by phone, webchat or online, they treat people 25 and under.
Another option I always suggest for people not enjoying uni is to perhaps defer until you feel as though you want to continue, although I can't tell you what to do, it's just a suggestion.
We'd really like to hear back from you.