when my boyfriend was two,his parents moved to canada.he was born in the united states,also his mother was born here and grew up in the us.we plan

If your boyfriend was born in the U.S. then he is most likely a U.S. citizen. If you are the foreign national then he most likely can sponsor you for an immigrant visa or permanent residence. Depending on where you live the process may be done in the U.S. or via consular processing. You should contact an attorney.