OP, I have found people allocate their time based largely on what support network they have in place at that time. If they have a family and/or a DH to focus on them , understandably they focus on them . They have their family.
Your friend is married and feels she is in the next stage of her life. She sees this as a life commitment now and now her life is mapped out. She may or may not need you right now , or ever and that is all she can see right now.
She should have maintained a friendship with you, albeit lesser, as she is now married. Longevity in friendships is a cornerstone of life. If your friend has retracted from that ,the issue is HERS and not yours.
It is hard to know how she views friendships. Until we understand how she views friends , we cannot say.
I understand totally your frustration. In saying that, your frustration has boiled over and you have called her out. I see why you did that, out of frustration but it was wrong for you to do that. YOUR frustration has boiled over. She has not replied because i think this has put her in a difficult position. I am not saying she is right, i am saying she may know she has been wrong. She is now burying her head in the sand. Everything is ok for her now, so the sand is a good place to hide. Sands always shift with the tide. She cannot answer you now as she has no answer.
YOU need to manage how YOU respond to this. Do not allow others to affect you in such ways. Divert your anger and frustrations into activities that better you, such as walking, Yoga, Podcasts, home spa etc.
I would leave it there now OP and
start building new friendships for yourself. Leave the door ajar for her in the future. You may find in time you have outgrown her and you are in a different place with different demands on you. She knows where you are.
Move on OP and don't wait for any replies. You have called her out and she has no reply. She cannot reply, she has let you down. She will not reply as she cannot justify. She will ignore your msg as she has nothing to say that justifies her actions.
Move on and should she contact you in the future, decide how that fits in with you at that time and how you respond.