Have you run the financial aid calculators, and have you discussed the effects of reporting your income on your potential spouse’s FAFSA? Before you move up your wedding date (I presume you had one potentially in the future because you use the expression “significant other”), make certain that any potentially negative consequences to your joint finances that could come from being married are indeed offset by the benefit your potential spouse expects in financial aid.
The basic question to ask yourself is this one: Would I marry this person if there were no difference in his/her financial aid package as a married person?