"If you love something set it free. If it doesn't come back, then it wasn't meant to be." Trying to hold on to something usually doesn't work. All love has to be equal give or holding on just prolongs the inevitable split. If they cant get along then separate the times your with them. See one and mute the other during that time. Then vice versa. Maybe distance is what they need from each other and spending time with you solo for a while. This is just a suggestion. I don't really know 98% of what is going on in your life, or the whole situation. So take this with as little or as munch seriousness as you please.