I don't think you should be worried. First because it never serves you well to ever worry about anything, especially in love and relationships. It doesn't change things, it only causes you to be worried, which never feels good. Second, in my experience, guys are not as communication happy as girls. Usually the ones who are overzealous in this area, are the ones to look out for, you know, stalker types. I've been married almost 20 years and my husband rarely emails me back, but I know this is true for him with his own mom too so I don't take offense. ?