We weren’t married, but lived common-law. Can I still get spousal support?

Yes, you may bring a claim under the Family Law Act which contemplates common-law couples.

However, in order for your claim to be successful you must satisfy the extended definition of “spouse” under s. 29 of the Act. Therefore, to qualify you and your partner must have cohabited for a period of 3 years or longer, or the relationship must have been of some permanence and you and your partner must be either the natural or adoptive parents of a child.