"You need to take responsibility for me needing to cheat on you"
Morrison, do yourself a favor and really take a hard look at that statement.
How many levels of betrayal are inherent to those actions?
How much was premeditated?
How many lies to your face to cover up?
And, keep in mind, she is not without empathy, quite the opposite, because BPD have empathy, they can lock into us, read us but because they lack conscience, they can use it against us. And they do. Why? They don't feel bad about hurting their partners. The non only acts as salve to their pain.
"You stopped validating me and I needed it from someone",
They are bottomless pits.
She is always the one to sooth these pains of mine.
She has empathy, but her actions without conscience are your pain.
Any other suggestions of how to manage the weak moments in the beginning of the break up? These wounds are deep and I will try anything to heal them.
Post here and be thankful that you are not married with children. Read the hell those people are living.
Include myself and experiences in that. It is not your responsibility to rescue her from herself. That is her job.
It hurts like nothing else, but you will eventually heal and she most likely will not.