It looks like you probably have already closed on this, but for anyone else considering doing this - DON'T. If the loan is in your name only, there is no reason for anyone else's name to be on the deed, especially if you are not married. If you are married and the loan is only in your name, there are other legal reasons to not have your spouse on it, but consult with an attorney (or CPA for tax purposes). If this other person is putting up part of the down payment and you REALLY want them to be a part of the transaction, then have the settlement company record a 2nd lien on the property AFTER the settlement, with your friend as the lien holder for the amount they put in. That way they "feel" they are part owner of the house.
If you should break up, they can't claim ownership but you have to pay them back for what is recorded on the lien, because they can prevent you from selling while that lien creates what is called a "cloud on the title". Be sure that you have the payoff of the lien recorded with the county so you'll have clear title whenever you go to sell the home.