It is very possible that you are falling into a relationship. In fact, simply wondering about whether you are falling into a relationship is often an indication that you are.
A good way to be more expressive with your girlfriend is to learn to start trusting her and believing in yourself.
The reason why you may not be expressive could be because you are uncomfortable about something. You may think that if you tried to be more expressive in some particular way, she would not approve.
That may worry you. You may also think that you simply don’t know how to do it because you have never been expressive in the past.
If your ex girlfriend told you that she would not meet up with you so as not to open up old wounds, there is a very good chance that she has moved on mentally from the relationship and doesn’t want to put herself in a difficult position.
She just doesn’t want to put out any more effort.
Meeting up with you may simply not be worth it to her.
You should ask yourself why you want so badly to meet up with your ex girlfriend.