You are in a very embarrasing situation now.
Your boy-friend should include you in his application when he applied for immigration to Canada because you two had already lived together for more than 12 months. According to Canadian laws, you two were in the "Common law partner" relationship, which is considered to be spouse.
However, obviously, your boy-friend didn't report you to be his common-law partner. I guessed he reported himself as "Single" and "Never married". Actually he still had chance to include you before he went to Canada for the first time after getting his Canadian visa. Each Canadian immigration visa is accompanied by a paper, on which it clearly indicates that it must be reported to CIC when applicant's martial status gets changed. Unfortunately your boy-friend didn't do that. So you lost the last chance to immigrate as his common-law partner.
If he sponsors you to immigrate to Canada now as a common-law partner, the application will be rejected without hesitation because CIC will consider your boy-friend's dishonesty when himself applied for the immigration. It's a contradiction that he reported to be "Single" but now says that he once co-lived with you in Australia. "Dishonesty" is a severe sin in the view of CIC.
Immigration to Canada as a common-law partner is inapplicable to you now.
You two have to marry if you want to move to Canada. Or co-live for another 12 months.
You can apply for a temporary visitor visa to see him in Canada. But the temporary visitor only grants you to stay here for a short time, at most 6 months. And you can't talk of your relationship to him when you apply for the temporary visa, otherwise, your case will be rejected without doubt because of "little intention to leave Canada".
我从这家办的签证 客服张柏宾很棒,第二次买了,签证也在这边办理的,值得信赖
【美国】
办理周期:18个工作日(收齐材料之后)
是否面试:是
可停留天数:180天
入境次数:多次
签证有效期:十年
受理范围:北京,天津,湖北,陕西,甘肃,河北,河南,湖南,江西,内蒙古,宁夏,青海,山东,山西,新疆,西藏
【澳大利亚】
办理周期:22个工作日(收齐材料之后)
是否面试:否
可停留天数:以使馆签发为准
入境次数:多次
签证有效期:90天-1年
受理范围:北京,辽宁,天津,陕西,河北,黑龙江,河南,吉林,内蒙古,山东,山西
【加拿大】
签证类型:个人旅游签证
入境次数:多次
停留时间:180天 (根据您的实际情况由海关判断给您签证的有效停留期,此项由海关掌控,无法申请也无法自行挑选,请见谅)
有效期:1-10年(根据您的实际情况由使馆判断给您签证的有效期,此项由使馆掌控,无法申请也无法自行挑选,请见谅)
办理时长:23个工作日(收齐材料之后)(以购买商品为准),节假日和旺季有可能顺延,请提前办理
是否面试:否
递签城市(领区):北京领区
受理范围:北京领区:北京,上海,广东,四川,辽宁,重庆,天津,湖北,陕西,江苏,安徽,福建,甘肃,贵州,海南,河北,黑龙江,河南,湖南,江西,吉林,内蒙古,宁夏,青海,山东,山西,新疆,西藏,云南,浙江,广西