Wow, megasanquis, can I just say that I'm quite impressed with your maturity and how you think things through. Just because you are 15, I do not have preconceived notions or ideas about you as a person. Not everyone does that
It sounds to me like you are both taking your time and becoming close friends. While doing that, it stands to reason that you may find things about him that really click with your way of thinking hence, you wonder if a deeper relationship could come out of your friendship. That is completely normal and I think acceptable.
While you are still quite young (not meaning as a put down), there is still a lot to learn about relationships and communication. Even as adults we still continue to learn about our relationships and communication.
I applaud you both on your inner strengths for not jumping into a physical relationship. I'm sure you are aware that when that happens, it can put either of you in peril for many different reasons.
Since you have both been so good at being patient and learning about one another up to this point, I believe that you should continue down that path. In a good and healthy relationship, intimacy is so very important. And I don't mean physical/sexual intimacy, I mean the kind that comes from knowing a person inside and out...the kind that means you can relate to his emotions/fears/joys with your heart and he to yours. From that type of intimacy will grow more respect and friendship.....the kind that creates a good solid basis for a mutually satisfying deeper relationship.
This is not to say that your physical desires are not valid. But from what I understand from your post, you have a good insight into yourself and how you are feeling emotionally and physically.
Take your time hon.....relax and let yourself enjoy his company as close friends. I wish that I had your insight when I was your age.
Hugssss
sabby