I'm originally from the Montreal area myself, so wanted to be sure to welcome you.
The only thing that really stands out on the expense side of things is your car, which eats up a big chunk of your income all together, but you already know that! Other expenses are not excessive, but you may still be able to reduce them a little bit here and there - optimize them - to squeeze out a bit more room for savings. Especially important when your rent goes up in a few months.
The thing that strikes me, actually, is that your rent is SO cheap, and you've only listed the electricity bill - is there no gas, or water bill as well? The thing is that your housing is relatively cheap, which is why you're managing ok financially. But your best effort is probably going to be spent on trying to increase your income.
I also assume your GF has at least a part-time job, and is able to pay for her own clothes, toiletries, haircuts, etc? Also, when will she be finished school, and will you guys continue in the shared accommodation after that time? If she's graduating soon, it would be good to start thinking now about your future plans, so that you two don't get sucked into excessive lifestyle inflation once she starts earning more.
Anyway, best of luck to you!