In order to sponsor her for permanent residency, you need to either be married or common law. Common law means you must have lived together for at least one year continuously.
Another option would be for her to come to Canada to study full time. However this is an expensive option and she will have to obtain a study permit and pay foreign tuition rates which are much higher than domestic student rates. If she wants to go this route, she will first need to be accepted by a school in Canada and would then have to apply for a study permit. She will need to have a bank balance with at least $25K in it to be accepted to cover first year tuition and living expenses.
Yet another option would be to look into the IEC/Working Holiday Visa program. If she is accepted under this program, she would be allowed to move to Canada temporarily (1 year) and work here.