Krystal, I am a loan officer. Please feel free to contact me at 973 979 4100 to discuss your loan scenario and let's get your boyfriend preqialified for a mortgage. I am happy to answer your mortgage questions, 7 days a week.
Krystal.... rather than asking this of a bunch of Realtors on the internet, go ahead and do the paperwork to get an actual pre-approval from a bank. Then you'll have the answer - and the pre-approval you should have in hand before you actually tour homes.