Just the kind of answer I hope for. What skill it must take to mold how others see you. I'm powerless there. Teach me! lol But really, I'm good with it. By the sound of how closeness, for you, doesn't seem to register between you and your interested listener, it appears you don't have an interest in developing a "selfless" relationship? Regrettably, that's the only word that would come to me. But it's like you said, you'll thrill and excite someone, but your energy doesn't always linger with the person for long. It flows wherever your yearning takes you, right? I think I know someone like that who is also a 4w3.
That aside, I relate to you on returning to the loneliness. Even after great encounters, it's like I leave empty-handed. Something's not satisfying about what I'm left with. And yeah, self-indulgence is sweet.