Madison, meltdowns are good when they take us to our bottom...mine did and I have never looked back. In a healthy relationship, nobody needs to blame or shame or figure out who is giving more than another and trust is a given by both parties. Anything less than that is toxic.
It helps to grieve your loss, just don't hang out there too long. Instead look ahead to brighter tomorrows, because they will come, I promise. We need to say goodbye to yesterday if we are to open ourselves to all the beauty in today. The tomorrows will take care of themselves.
Just for today, focus on only you and your daughter. Put the thoughts of "what might have been" on the shelf with the "coulda's, woulda's and shoulda's"...you don't need those useless emotions anymore, because today is your new day of new beginnings. Embrace it all.
Hugs