In addition to all this advice, explore what you're feeling. We often lack the emotional language to understand and name what we're feeling when we first feel it. Why are conversations and time spent together different? Sometimes dating can move into a "comfort" stage where things are and they're safe and warm and not goofy or silly and it can be really jarring or alien.

He may be feeling as awkward as you are. Talk it out and take it step by step.