Not really it doesn't matter. If he wants to marry you he'll Mary you wether you are here legally or not, or even if you told him. If he wants you he'll probably laugh and say it doesn't matter. Which is the truth. It doesn't matter.

But in all seriousness date the guy for a year before being so worried lol. You're gonna make a fool of yourself otherwise. Get to know each other. If this is your first serious relationship go easy, love is a tricky game.