Build a Relationship / Becoming Less Boring

What Frankie said.

I should mention that reading books and getting advice from others is probably not the best way to explore how to improve your seedling of a relationship.

Like Frankie said, just hanging out together is a good place to start. When you say you have chemistry and all that shit, I imagine you had conversations at some point. Continue with the conversations - explore each other - ask questions, be inquisitive.

Dating isn't all about going out all the time or being socially active. Sometimes, just laying around the house all day watching movies and subsequently talking about them is a great way to go.

Being "more fun" is a perspective. If the girl likes you, being with you is fun enough. Do you really need to constantly be entertained in order to maintain this relationship? If this is the case, you're kinda doomed.

Jam it back in, in the dark.