Flatulence problems. Please help?

Yeah...I really like this guy but whenever he comes to approach me in the school yard I can feel this gassy smell coming near. Does he have micro-flatulence? The smell isn't overpowering but when I try to smile I feel myself choking. I feel this really ruins the mood. How to help him without being rude? What if he farts in bed? Really need help right now, pleease!