Alright so I tried talking to her about the situation, and the girl she was talking to and at first she was telling she is only physically attracted to other women but after doing some of my own investigation I found that this is not true and I confronted her about it where she had admitted that she has feelings for the girl. I was happy about the fact that she finally was telling me the truth about the situation.We continued to try and discuss and then she told me that she is very confused because she wants to spend the rest of her life with me but she also has feelings for women that she cannot deny and she does not know what to do. I was trying to make things work out with her because I love her and want to spend the rest of my life with but now she wants to be able to overnight at that girls place and have sex with her from time to time, and she said we could explore being open since she wants to do that. I really just wanted a committed relationship and I am not really into the open relationship because it can cause more problems than it can fix. I am really thinking if working this out with her is worth it, I am starting to think maybe I should let go and start over. A part me of regrets letting her explore that side of her because I feel like I am losing her but I know it was the right thing to do because she would never have been truly happy. I feel as if this just going to have more long term harm than good so I really need to know if I should just break this off.