Most Helpful Guy
Get some plastic shoes and rub your feet on the carpet and build up a big static electric charge... then kiss him and I guarantee a big spark. I guess that's not the sort of spark you are looking for, but more seriously, you were probably too excited and nervous. Was it just one kiss? Was it short and over too quickly? Don't be looking for a 'spark' moment. Just enjoy his company and don't let it trouble you. It takes time to get used to each other. Don't base you relationship on a spark or lack of one.
Most Helpful Girl
Maybe you just need to give it more time and try again! Don't be so quick to jump to conclusions. Likely you did have some expectations from what your first kiss should feel like and like with most expectations it's seldom reality. We often fantasize about things only to find out it's not how we pictured it to be. Obviously kissing should feel good with the right guy but I really think you just need to give this time and practice.