I hadn't realized you guys were this young! Maybe you are similar now...but I'm willing to bet that in 5 years from now you'll be a lot different. You are both growing and maturing as people. Life will give each of you different experiences, bad and good ones and those experiences will have an affect in the development of your personalities.
If you think that this person is really worth it, than sure...try to be friends with him. However, if this process wears you out and if you don't see him doing as much to keep you close as well, then....let it go. As I said, move on...give chances to other people. You are so young! You're still at the very beginning.