Sorry to hear it couldn't work out.
Did she give any indication why compatibility wasn't there? I use that word in a relative way to her being closed off. Which to me, involves some type of communication gap.

I, myself, for instance, can seem to build some invisible wall, yet, oddly enough, for myself, it's more a matter of 'penny for thoughts' as an ice breaker. As well as, if I'm mustering/mulling over something that needs to be addressed yet I'm torn up inside about peacefully saying whatever it is, then I, myself, need to be heard without defensive posturing or with slapstick solution(aka fixing it).
That's where communication plays a large role and why I toss in the word compatibility.