I would like to thank everyone who responded. Every bit of information is useful as it lets the mind have an increased amount of choices. Having a large amount of choices and methods creates a more calculated decision making process.
I did not want to narrow the scope of this question to MLTR’s and FB’s because I feel that many people on this forum can benefit from all around LTR advice. I am under the assumption that the same mechanics are at work in LTR’s and MLTR’s, though I do not know for sure. In my case, I would like to have a relationship with 2 girls at the same time. I recently found that one of them is into open relationships, but the other one isn’t. The problem here is not to make them at peace with each other, but with how to make them be invested into a relationship which is open.
I pulled one of the girls from an open relationship. It seems as though creating an open relationship situation makes girls more likely to get hurt and leave. She does not want to see her ex-BF ever again due to some unimaginable drama. I want to be the person who can understand the process and avoid the same result happening to me as with this girl and her BF.

