I've been able to hold onto multiple long-term hook ups and relationships with girls from different circles, but girls from the same circle have a natural barrier up, since no matter how discrete I am, they still figure there's something between me and one of the other girls. I'm not interested in any close friends for obvious reasons, just acquaintances. And to make sure: Every girl I'm with knows exactly what our situation is, I'm not being deceitful.

Any advice? Is there any hope, or should I just forget about it?