It is a mix between the friend zone and nice guy persona.
It is a horrible place to be, you eventually develop feelings for that person and then they shoot some comment of f to you such as,
" We have such a great friendship and, I don't want things to get out of hand " .
" Last time it got out of control when I got to close with this other guy ".
Avoid this zone..the nice guy/friend zone/best friend zone mixed.
Close friends is probably going to far, if she ever calls you best friend you are butt fucked for life and have no chance with her at all -ever-.
This is coming from a guy who just delt with this situation today and it is a sucky ass place to be.
Do your self some good;
Pick up some weights.
Don't return her calls emails etc for a day.
Don't let her use you as an emotional door mat for her problems.
Never confirm best friend with her if she ever considers you that.
Just keep this in mind, it isn't because your ugly or an asshole or whatever it is. It is because you have gotten to close to her and if you do end up having something as more than friends and it went of course it would cause her to much emotional pain.
That is for nice girls, who sadly go for bad guys.
assume the opposite for sluts..
Girl: I like you as a best guy friend!
Guy 14 months later: I feel for you differently
Girl: We are to close and if it gets out of hand...well...
I am sorry!
This is a very realistic situation. I am speaking from personal experience..