If you love someone, tell him or her. Forget about the rules or the fear of looking ridiculous. What is truly ridiculous is passing up on an opportunity to tell someone that your heart is invested in him or her.
Life is full of opportunity, if we don't seize the ones that we know our hearts want us to, then what exactly are we doing? We have to let our pride and ego in many instances in life, especially when it relates to showing our feelings to someone that we care about. We never really know what a person may say when we tell them that we love them, but we can't let that hold us back.