So your heart has already been broken during the "with him" period. Well now you are well on your way to getting over a break up from this man.
Breaking up means you will go through the stages of grievance for this loss and guess what you will find a new different kind of love in time or stay here and find your own happiness within.
Also.my feeling are... if you are repeatedly posting out here...you probably want out of this sort of relationship. You have our blessings to "let go" of this sort of relationship.
He may change - he may never. Let him go and if he comes back to you then you can deal with that at time, you may be happier without him. I have to say I do not miss the roller-coaster ride... Who needs to feel weekly as if they are not worthy. Drugs and Dis-Order can stop with the proper care.
For me the "mis-trust" issue was the most painful part. If I was suspect of he was of me, it just was not healthy either way. And he created uncomfortable social situations, competitions, acts of jealousy and then it would be all my fault it happen or he would say women just always do that to him, it just always happens to happen to him. BPD men are not protectors of their family,just themselves. Sadly.
If its not fun-loving its not a healthy situation.
As humans we come into this world pure, as children we gain a spirit to our souls and our environments can effect our development. I am very sad to learn my ex may be off-beat with this disorder but I am sure this life also belongs to me and I can have many things I want, my way. My health, my personal self worth,peace of mind and feeling like a woman should are all important for my well-being. Consider what you want for yourself and make the best decision for you moving forward.
I once read a sign and it said:
"If you do not take charge of your life, someone else will"
It changed the way I thought about myself in relation to the world around me and others.
If you leave him...in time you will find a new hope, a new love and yourself worth and beauty back in check. And find a loving relationship full of compromise,trust,empathy, compassion, sex and laughter=unconditional love.
We lose good people every day and for me I would prefer to maintain my peace of mind and hold them in love within my heart rather than be dragged down for "no apparent reason" yes they may have a good reason but not if they are in denial, and many men are as well as women are in denial, so you cannot change any one who is not willing to see what pain they are doing. Only you can change your actions.
Please go now and "Do the right thing."