Yes, I have, in the past. I'm married now, and older, but I remember the feeling well. If he's taken you on 15 dates, you can be pretty darn sure he's interested! You sound as if you are fairly young. Young relationships are very different, and often very complicated, mainly because sometimes feelings are not expressed like they do once you get older. Young people send mixed signals a lot. But I can tell you one thing for sure--you are definitely not uninteresting to this guy, or he wouldn't have asked you out on 15 dates!