as above, Confirmation is a requirement for matrimony, but not an absolute, will not prevent you from being married, but a continual refusal or delay in completing your Christian initiation may raise doubts in your pastor’s mind about your intent to life fully in accord with Catholic teaching after your marriage, and about your maturity.
One note, because it always causes confustion. If you are married outside the church, civilly, common law, or cohabitating, you must rectify that situation first, according to your pastor’s direction, and return to a state of grace through confession, before you can approach the sacrament of confirmation (or of Eucharist, of course).