I really think you should find a second T , with a relational background, to help you orto act as a consultant. You are going to need support if she terminates with you. What made you decide to share this with her now? I hope she sticks it out with you, if that is what you want. Obsession ( called limerence sometimes) functions as a way to keep the mind off other painful internal things, and takes away a lot of energy forgiving and for self exploration. i really feel for how much this must hurt, and I hope she stays and supports you.