I had to read between the lines a bit. What I gathered is that she more or less dropped you, told you that she didn't want to have anything to do with you, and so you took the "hint" and disappeared from her life for 45 days.
You never had closure because of the abrupt termination of your relationship, and so you swallowed your price, took a chance at rejection and contacted her.
not meet you with open arms, but rather received you scornfully, meeting your worst expectations.
You then gave her some information about seeing your ex, perhaps to tell her that you weren't interested in her, but her response was that she had someone better, and gloated over it (and later removed it).
She seems unsettled and immature, but also has made is clear that she is not interested in getting back with you, although she may still be thinking about it. This new romance of hers, if there is one, isn't going anywhere.
I think that you might serve yourself well by asking her if she wants to go out with you and see what she says. If she says no, then ask his if she wants you to leave her alone and stop calling her. Tell her that if she says yes then you will respect her wishes and never call again. Put the decision in her court. If she says yes, then you have closure and you can move on with your life.
This way you will know that you have tried. You will have invited her to try to resume the relationship, or at least take the first step. She either will agree to try at least a date, or will turn you down, thus shutting the door completely on your relationship. It seems she already has, but this is the way to find out for sure.
I believe this is the best plan of action for you, and, whatever the outcome, I believe it is the best approach.
I wish you great success in either resuming your relationship, or finding closure, if you can not get the relationship going again.
I wish you strength, wisdom, and perseverance.
Elliott Sewell, LPCC, NCC, CCMHC