Decisions, Decisions

As I've said before, I'm the type of guy who needs to be in a relationship. Having someone there for me is incredibly important to my stability.
Over the past couple of months, I've 'liked' a number of people, and have been just about to ask them put when they start acting really really cold towards me because they discover my intentions. I'm sure this isn't totally their fault but it's had a pretty severe impact on my esteem.

I 'like' someone at the moment, but I'm hesitant to do anything about. Firstly, it could ruin our friendship, we ate very good friends at the moment. Secondly, I was talking to a friend of mine about relationships, and it is his view that people our age aren't mature enough for a stable relationship. While I don't necessarily agree, I can see where he is coming from. Most teenagers (I've noticed girls in particular, although boys are still in there) aren't ready to handle a full relationship.
This makes me hesitant, because I want a stable relationship, more than anything else. More than the iPhone 3G, and I want that a hell of a lot.
I'm also going to wait, because I'm about to leave for Hong Kong (where I live) and I've learnt from experience not to ask someone out and then go away for weeks. It ruins what could be a great relationship.