When somebody meets that special someone else and becomes so enchanted with them that they choose to spend more and more time with them. Time previously devoted to engaging in recreational pursuits with friends, family and co-workers.
"Hey, where's Donna? She hasn't come out for Dinner and Male Revue on Thursdays for weeks!"
"Out with Joe again."
"Again? Uh-oh do you think its boyitis?"
"Maybe. Her mom said she doesn't even go to darts anymore."