<human>: Can you condense the text into three sentences or less?

Basically, she claims she can't talk about problems in our relationship or her feelings on anything complicated because she's an I.E.  

She says she wants to change, but she never has... and maybe she really does, but she can't?  But, what she does choose to communicate to me about things that one might consider important or significant in a relationship, they're fleeting.  It's like they have a short shelf life until she changes her mind about how she feels.  Which is human to do, but there's a lot of "I would never do that/Now I would totally do that" going on.  I've noticed it more and more over the last few years.  And she only ever tells me anything because I ask.  She almost never volunteers any information about herself unless it's bitching about work or quoting tv shows/movies.  

Thank you for letting me vent.  I'm lost in this relationship and it makes me sad and things seem hopeless.
<bot>: Girlfriend says she is Introverted Extrovert; says that's why she's never communicated with me and it's pretty much killed our relationship