I am really sorry you feel this way and I am really glad you wrote it down here and have others reflect with you.
I hope my post is not too forward but I want to say few things:
You are strong. Cause you can function without your therapist and she probably feels that way too. You are strong.
It is unfortunate your therapist did not fill this strength for you while you still needed her but at the same time, you are still strong enough to keep going without her. This is really good and I can see you recognize this strength and I hope you are so proud of yourself that you felt the need for help and took things into your hands and you are fine!
Now you are angry. And this is also good. You got strength enough to feel you are angry because you believe you were ignored by your therapist. Do you see the difference?
You did not need her for soothing you. You did that all yourself but you are angry by the ignoring of the text. This is at minimum misunderstanding to rude and at maximum ignoring or again misunderstanding. You will never know unless you find out by asking her.
I hope you can separate:
you needed her for soothing/dependence - you are fine. you did it alone and you are OK just like any other healthy person.
she ignored your text (or did not respond) - the reasons can be many including ignoring or maybe to million other reasons including having her own issues in life with kids, family, work etc - you feel angry rightfully but you do not have the full story yet.
To and not to go therapist: I will leave it up to you but if I were you, I would go and say I want to respectfully know why you did not respond to my text. I would also share with her that you needed her and you manage without here - THIS IS REALLY AN ACCOMPLISHMENT for you!
But I also understand you do not want to go. If I am super overwhelmed with feelings arising from the therapist and I am feeling hot headed, I also rather not go so I get you.