Sorry, but he’s not interested. If he was, he wouldn’t tell you he was bored chatting with you and that this isn’t a serious relationship. If he liked you enough to date you, he’d make a date with you rather than postponing getting together.
The beauty of dating is that it’s a process that both people, the man and the woman, can use to see if their date is someone they like enough to pursue a relationship with. So while you may be bummed out that he isn’t interested in you, you should be REALLY glad that he isn’t wasting your time. Lots of men and women spend inordinate amounts of time with dates on the internet before they meet and realize there is no chemistry between them in real life.
Dating is really a numbers game, and the more people you date, if you date smart, the more likely it is that you’ll eventually meet someone fabulous for you! So figure out what it is about him that didn’t work, and vice verse.
My guess is that although you may be mature, you’re too young for him. If he’s 20 years old and working in a real job and living in another city, it doesn’t make a lot of sense that he’d want to date a 16 year old who’s in high school. You’re really living in two different worlds, and while it may feel exciting to be with an older man, at your age, this isn’t an ideal age gap.
I hope that helps, and while you’re disappointed, you should really just get back out there and see who’s there for you who’s more compatible this time around! 🙂