They're looking for a more serious relationship with someone who likes them as a person, and want to get to know someone before they get physical. For example, you can just send him a text message that you are really looking forward for the date. They get good at keeping it a secret and dodging conversations where personal sex stories might come up.
Calling all the shyness is shy you aren't attracted to it. Turns out this niceness can actually be smothering your romantic relationship. His initial approach may be standard enough and then BAM!