I guess - each person who changes his faith has got different reasons or motivations that led them to this decision. Some of them are due to bf/gf. But - they are only some of the cases. In many cases - I think its when a person finds the faith more appealing to them and being able to find answers to their questions about life and the purpose of us being here. THere are a few who change the faith as they feel more secure.. some others who find it logical and well reasoned. There could be many other reasons also..

ARMY

"Work like you don't need the money, Love like you've never been hurt, and dance like you do when nobody's watching "!