My nesting partner (32F) and I (23F) have been fighting a lot these past few weeks for a variety of different reasons, but one of them has been the presence of my lover (22F) in my life. My partner has been exhibiting a lot of jealousy towards her and instead of trying to come to the bottom of that feeling, partner has taken to trying to basically monitor my communication and time with her, constantly asking me if im texting her even when we aren't together, blaming our lack of communication lately on her, demanding to know where I am at every hour of the day. Last night we had a massive fight which ended with her pushing me away as much as possible, telling me to leave, etc. I was supposed to have plans this evening with lover but now i am faced with the ultimatum of if I go over to her place, im not welcome back in our apartment. I know that if I ask to reschedule, I will be met with understanding and it will be okay, but part of me feels like its not fair to her.