Hair ( I really need your advice!)

OK, so if you read my WIWW post yesterday, then you already know that I am getting my hair cut tomorrow. 

I want a change...I think

There are a a few problems with my hair now:

#1. It takes FOREVER! and I mean FOREVER, like 3 years, to grow out.  I cut my hair short about 3 years ago, and have been growing it out since then. I started to take biotin around christmas and that worked immensely. Now, its semi-long and probably about as long as it will grow. 

This is a problem because, if I was to cut it short, It wouldn't grow back fast.

Here is what it looks like now. 

(do you see that NASTY blue streak, Yup. still there, and still HATE it)

#2. it is style-less. The only thing I can do to style it is to

a. put it in a pony tail

or b. straighten it

This is very frustrating because I have absolutely NO versatility.

So here is what I was thinking...

Searching through pinterest

(by the way, Did you notice that new bar on the side ----------> there! 

you can now follow me personally on pinterest!!)

where was I? oh right, Hair

So I found these pictures last night and fell in love.

So you get where I'm going with this, right?

I'm thinking a long bob.

I want to, I really do, but I have a couple concerns:

a. what if I hate it in a couple weeks and want my ever so slow-growing, long hair back

and b. It will make me look like I am twelve.

You see, I am often mistaken for being younger than I actually am, and as much as I will appreciate that when I am older, I really dont like it now. 

What I like about cutting my hair short:

-easy styling that will look effortless

-not so dang hot (with summer coming, I know I will appreciate it)

-less brush time and less time in the shower

 Like I said, I cut my hair short a while a go and here is what it looked like:

It wont be this short, if I decide to cut it, mainly because I HAVE to be able to put it up and plus, I just want some hair.

So, as you can see, I REALLY REALLY REALLY need your help.

Should I cut it? or leave it?

If I do cut it, will it make me look younger?

If I leave it long, How should I trim it?

Any suggestions besides what I have? 

Maybe a new style all together??

AM I CRAZY?

yes, you should know that already.

Please, I am begging, begging, for your suggestions and help!