The tale of Joe and Caroline is one of the classics. Guy sees girl, thinks she's cute, never approaches nor says hi. Girl doesn't notice guy at first, until she does. She says hi, guy says hi back. Years go by, they see each other again. But like two passing ships, they say hello, and continue on with their lives. Guy sees girl, girl sees guy, guy finally says hi first, girl says hi back, but this time conversation begins.
Guy then invites girl to party, girl accepts. Guy and girl go on date together. Guy and girl have so much fun on said date, they close out the restaurant. Very quickly guy and girl realize this is something special. One thing leads to another, and they are dating. Then they date some more. Then they move in together. Then guy proposes to, now, woman. Woman had no idea, very excited, very happy, says YES.