Commitment

Hi ladies. So my man and I have been together since over the summer. I have quickly realized there is a good chance we could end up getting married. He's an amazing man. However, he is 10 years older than me and I always get nervous thinking about getting married in the next few years. Not so much about being committed to someone forever but just liking someone for ever. Does the spark completely go away or are there ways you can save it?