Wow, this conversation has become so lively! Thank you all for your support
you're a really helpful community!
When I said I'll become rude next time, I said it in a joking way
However, I'm still glad that it inspired even more conversation!
I was away during the past 2 days, on a programmed trip that had the perfect timing to cheer me up
I even got to better understand his way of thinking. He's the kind of person who would often be ashamed of himself and easily be taken down by fear. However, this relationship developed so fast... He also told me several things that one would normally only tell their close friends. I think you're starting to get the picture - now may I drop a hint about some things that he made me promise not to tell anyone about?... Of course, when he was opening up to me (on his own free will - I didn't ask), I was supportive and tried to boost his self-confidence, but this isn't enough to prevent hidden feelings of guilt.
As for just running away from someone without an explanation, I think nobody deserves this, no matter what they've done. If not having their wrongdoings explained to them, or having your personal fears or worries exposed, they deserve at least an excuse. I've recently been to that end - I wanted to break free of a relationship that was making me suffocate, and besides, it was in a period of time where I was so busy that I was about to lose my head. I just excused myself for a few days, let the unrelated storm pass, and then I spoke calmly and sincerely. I even said that we didn't need to cut all contact, as long as the particular thing that bothered me went away, but that I'd respect any decision. Given the circumstances and the particular person's history, I'd be excused if I just suddenly disappeared, and it would have been easier.
Even if they have this vampire-like attitude that you spoke about, there are better ways to deal with it. Most people will respond positively when you properly set your limits, and they can even prove to be wonderful people who have a lot to give. Of course, setting your limits might not work, but still, that's better than letting them believe you are glad with the present situation and then disappearing out of the blue...
Still, I cannot demand everyone else to be perfect in order to excuse my wrongdoings. On the contrary - myself is the only part that I can directly influence, everything else will change through my own improvements. And sometimes, just sometimes, maybe I do deserve something better...