A couple things ..
1)If there is any indication that you will one day marry, the conjugal will be denied... CIC will say apply when that day comes, immigration is not to "try it out" or for "fiancée"...
It is for people who consider themselves spouses...
2) I've read allysons story, they are a hetreosexual couple (not that it matters) and her application was bulletproof, demonstrating every level of interdependence... She knew/knows the processing guideline inside and out, I think she would have a good idea if your app is solid...
my suggestion, if marriage is your eventual intention, bite the bullet and do it now... Submit this to CIC with related evidence/ explaination while your application is in process and they will change your application to a standard spousal one... Likely ensuring your success if the rest of your evidence is solid and your application is in order...
Good luck