Thanks for your advice on getting married. In Canada, there is no requirement to get married. Marriage is a choice and couples may choose not to be married. This is quite clear in the CICs own manuals which I have read in minute detail.
See the third paragraph of 5.45 below from the CICs operating manual.
5.45. What is a conjugal partner?
This category was created for exceptional circumstances – for foreign national partners of Canadian or permanent resident sponsors who would ordinarily apply as common-law partners but for the fact that they have not been able to live together continuously for one year, usually because of an immigration impediment. In most cases, the foreign partner is also not able to marry their sponsor and qualify as a spouse. In all other respects, the couple is similar to a common-law couple or a married couple, i.e., they have been in a bona fide conjugal relationship for a period of at least one year.
Both marriage and common-law partnership (common-law partnerships may be opposite-sex and same-sex) are legally recognized in Canada for purposes of federal benefits and obligations (Modernization of Benefits and Obligations Act, June 2000). In order to be eligible for federal benefits, couples must either be married or meet the definition of common-law partner in each statute or regulation. IRPA brought CIC's immigration legislation into conformity with the Modernization of Benefits and Obligations Act.
Because of Supreme Court decisions, the choice not to marry is a constitutionally protected choice. Thus, CIC cannot require couples to marry in order to immigrate. However, if they are not married, they must be common-law partners. There is NO provision for fiancé(e)s or “intended common-law partners” in IRPA. If a Canadian and a foreign national can get married or can live together and establish a common-law relationship, this is what they are expected to have done before they submit sponsorship and immigration applications.
Marriage immediately creates a legal relationship recognized for immigration purposes. Common- law partners, however, have to meet the definition, including living together continuously for one year to have their relationship legally recognized. In the immigration context, there are some exceptional circumstances where a Canadian is in a conjugal relationship with a foreign national partner and would ordinarily sponsor that person as a common-law partner, but the two have not been able to live together continuously for one year, usually because immigration rules prevent them from long stays in one another's countries. As well, for these individuals, marriage is usually not an available option. The conjugal partner category is mainly intended for partners where neither common-law partner status nor marriage is possible, usually because of marital status or sexual orientation (both analogous grounds of discrimination under the Charter), combined with an immigration barrier.