Hello Pcarter,
don't blame yourself for him running away . It sounds like there are established patterns in reaching out to other women and running away (shutting down or trying suicide) when overwhelmed. These are hard to deal with .
His ups and downs are from being very out going to not talking at all. He will just shut down. He sleeps a lot and always makes me feel like the bad person.
A pwBPD will act in a way that their inner feelings are felt by their partner. This is called transference and while we all do it all the time it goes to extremes with pwBPD. You are not a bad person and he does not truly believe you are a bad person. But when he feels bad it helps him if you suffer too so he makes you suffer. He can't help himself as instincts have taken over. There are strategies to protect yourself from his behavior and to support him to a degree keeping more level. You find starting points to them in the
LESSONS post.
He blocked me tonight from calling or texting
So he may or may not return. You may or may not welcome him again. Whatever - you will benefit from focusing on yourself and getting grounded by other relationships around you. Posting may help too. At the moment you have time and space to think and learn.
Are you in contact and if how do you communicate? How are you doing right now and what have you done lately for yourself?