Is it common for single BPD females to keep a group of people that they friend or toy with and use for material gain or say transportation?
Yes, and they also do it when they're not single. From my experience a pwBPD regards themselves as 'single' again as soon as their partner leaves for work in the morning.
She has destroyed my trust in her and basically broken my heart. But I know if we talk or see each other and I bring this back up she will probably rage.
You won't get any closure from her, screwedfriend, as much as you might want to. The best way for us to get closure is by working on our own issues. Those of us who become romantically involved with pwBPD tend to be a bit Co-dependent. We're people-pleasers, "rescuers", Knights in Shining Armour. That's not in itself a bad thing, but it
can get us into unhealthy situations or relationships.
Co-dependency: When Our Emotional Issues Affect Our True Availability will shed some light on this for you.