Fanatic
Definition; a person filled with excessive and often misguided enthusiasm for something

There's this friend of mine. It's a female and her name is... Well, let's call her 'Tatlim' - that way, she and I will know and everyone else can only guess...

Tatlim is a beautiful woman and she is one of the most vivacious women, I have ever known, but at the same time she is a woman consumed with terrible doubts. She is very capable in general with an exceptional entusiasm for learning/seeing new things/places. She is one of those people, who gets high on life itself, who simply doesn't need any other stimuli than simply to live.
Uh, she really hates early mornings, though, one can tell when she is a bit grumpy, but she will still look at you and send you such a sweet smile, that for a brief moment in time, you feel as though you're the only existance she cares about.

However, I would still use the term 'fanatic' when I describe Tatlim and that has to do with the terrible doubts I have mentioned she is consumed with at times.
You see, Tatlim is one of those people who backtracks on conversations constantly. She will go through a conversation in her head over and over and over again, trying to ascertain what was unspoken in that conversation, trying to ascertain whether or not the inflictions in tone of voice was covering something up, trying to ascertain whether or not the other person was true, honest and forthcoming or was holding back. In short, always seeking the hidden conversation within the conversation.

To be continued anon...