Thank you very much everyone for the responses. I appreciate your time and effort. I can't say that I already know what to do, but at least a have a better view of this now.
One thing doesn't make sense at all. Everyone knows, that you're not supposed to get married if you're not 100% ready and if it's not the right time yet. Because if you do, then it's called a marriage of convenience, right? But I get the impression that Canadian immigration system encourages (and in a way even forces) this kind of marriages. Let's say a couple wants to do this conjugal partnership thing, because they know they want to be together and they're serious about each other. But they don't want to get married right now, because the person that's immigrating cannot work, so they're short of money and cannot have the kind of wedding that they would like to have, so it's just not the right time. And what happens then is they get asked by immigration people why they're not married yet and their application gets denied. Because officially there's nothing that's "stopping" them from getting married. It's so wrong...
I knew I wanted to marry my Canadian boyfriend since the very beginning of our relationship and this for sure will happen sooner or later, unless this immigration mess tears us apart. But it just doesn't feel right to rush like this. And of course if we get married now our marriage will be a marriage of convenience, because I can't sit any longer and waste my time like this, as I can't work, I can't go to school, I can't have a medical insurance and it's just becoming too crazy. Most people say that conjugal partnership is too risky and tricky, so again... Obviously marriage is the only option we have, but even that won't guarantee that I'll get my PR. It's so wrong, but what can you do. I can't just sit and wait until one day we wake up and feel that wow, we're finally 100% ready to get married. But how can you come up with an idea like this when you're not working and have no money for the wedding or your family can't come to your wedding from overseas as you're not able to provide any financial support for their trip, or you're simply too exhausted from not being able to work and having your life on hold.
Ok, I'm done with feeling sorry for myself (and everyone else who's in a similar situation), thank you for listening and even more important - thank you for sharing your thoughts and experiences. That was very helpful, so thank you a lot. And in case there's anything else that crosses your mind, please let me know.