3x14 - The Secret World of Alex Mack

Alex is overwhelmed when an attractive guy starts looking her way. When he requests her as his study partner for "Romeo and Juliet," she can't control her chemical glows. It takes many blushes before she realizes that there is less to him than meets the eye. Things get worse when Dave spies on the kids and assumes that Alex's "Romeo" is the GC-161 kid.