How to know if you should let go or not?

me and my girl friend have been dating for about 2 months and she has a poly-amorous relationship with another girl(#2). (that not the problem) the girl thats my girlfriend is trans. and she has kids with the other girl(#2) and #2 family is keeping her from leaving with the kids to move back here. I support her being with #2 and I do realize that will be her first love. its just that its putting a lot of stress on me because we dont know when #2 is getting kicked out. we still dont have a house yet.
Asked Jan 02, 2017

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