What 'needs' did she have that you aren't meeting? She said she didn't feel heard. Why?
You asked what being unavailable looks like. For me: I don't answer the phone every time. I let it go to vm. I might call back later. Or I might listen to a vm and let it go. I don't volunteer information, or talk about me. I don't call just to talk. It's pursuing.
Our job is to listen. Not talk. This is a hard lesson that I've ignored for 8 months. It doesn't matter what we feel to them. It's about their feelings.
I worked hard on getting comfortable with responses that repeat back what they say. A good counselor does this and it draws out more from a person. A OP does fills this gap. If you can do it, then the OP isn't so special.
For example: "I feel like I'm not being heard" Me: "I understand, you feel that you are not being heard. What's been going on?" (I don't add anything else to that) There is usually a clarification by the other person. Me: "in xxxx situation, you feel like you aren't heard. I understand. (do not say "that must be (insert feeling here)" Let them get to the feeling themselves.
That moment is NOT the time for a solution. It's for you to add to your database of information of things that you might want to 180 silently.
Me& h + S M: 13 t: 14
H moved 2/12. Own apt 05/12, EAs, PAs, gfriends, oh my! I'm done. 12/12
"I get knocked down, but I get up again.. you're never gonna keep me down" Chumbawumba