Of course you are sad love, it IS sad, giving up on an idea that someone was a good partner, if only they'd stop doing x, y, z...
I know you feel drained, I know you feel deflated, but let me remind you, she is being reasonable for NOW..
Your OWN feelings have changed on this thread, from defeat, to anger, worry, guilt, focused. An abuser uses change, uses tactics to unseat their victim, so you will need to be on your guard for a little while longer, just until you have managed to remove all need to contact you.
If she has somewhere to go, push for that to be concluded as quickly as possible. Use the old 'It'll be better to do it sooner rather than later, as if it's delayed one or other of us will start to resent the other and it's best to part on the reasonable grounds we have at the moment, not wait until it gets so we can't stand to share the same oxygen." Make sure she redirects her post, make sure any bills she owes you for are paid. remove all reason for her to contact you.
When it's done, change your number, change your email, and if she emails work, get that nipped in the bud too.
The phone call is a classic abuser thing, they all do that, and she will try to do that more and more I am sure. SHE is the one that is panicking.
Don't rise to it, don't answer her calls, let the voicemail get it and text her back. Switch off phones if you have to.