3 infatuations - what do I do?

There is nothing wrong with that. Everyone has something or someone that does that for them. You use whatever gets you by. But, you do need to find a center where as you can still have your infatuation but still accomplish your goal that was set. You don't have to let your eyes shift off when you sing just close your eyes and see you and him together and sing your heart out without actually looking at him or anyone else. No one will ever know what or who you were thinking about but just remembering how Beautiful your voice sounded when you sang!