Hi there,
gah. I've followed some of your story from the Staying boards. It's never easy to 'welcome' someone to Leaving from Staying, but I hope that you can find the support and encouragement that you need here.
I would encourage you to look at the five stages of detachment on the sidebar =====>
What stage do you feel like you're in right now?
Since removing myself from the situation I have a hard time feeling empathy or sympathy for him. I know I should. He's not well.
Don't pressure yourself to feel things that aren't coming naturally right now. It's normal to have a hard time feeling empathy or sympathy for someone who hurt us and lied to us, no matter what illness they might have.
Empathy for others comes more easily once we have empathy for ourselves. Go easy on yourself - you know you need time to heal.
I find myself angry, full of revenge-type feelings and actions, that I feel guilty for after.
Anger is an important part of detachment and healing. Revenge fantasies are just that - fantasies.
We all too often become our own 'thought police,' and feel guilty for thoughts and fantasies. But our mind is our one completely private place to process through our feelings and experiences. These feelings, thoughts, and fantasies are all trying to tell us important things about ourselves. It's good to sit with them, work through them. Let yourself feel them.
I'm so scared of letting him in... . I know I need to time to heal and wished I met him later. I've spent a long time on my own.
Do you think maybe exploring a friendship would be more comfortable? That way, there's no pressure on either of you, and you can take time to get to know each other while you each work on yourself. It's completely understandable to feel 'gun shy' about entering into a relationship after having a relationship with someone with BPD or BPD traits.
The most important thing is to take care of You.
You mention having issues with trust and jealousy, even before your ex. Where do you think those might come from?