Y'know... it may be that she is making a big mistake... but I would take a careful look at how you are viewing the situation and maybe you'll find your own answer there. Even though it may seem like a mistake to you, it sounds like she has some really serious issues going on. Saying things like "I want her for myself" and "sometimes I hate her, sometimes I pity her" lead me to think that you may not be in the best position to be a good thing for her right now - which is okay. We all need our own time, space, and experience to grow. I sympathize with your pain and I sincerely wish you healing, but it sounds like she really needs someone solid to be there for her right now and you may want to examine if you're in the right place to be that for her. Sometimes people need to make their own mistakes, and who knows, maybe it's not such a bad situation. Being with someone for money may seem "pathetic", but the reality of it is, it may be the best thing for her during this chapter of her life - it's not really your or our place to speculate. It is especially difficult to see her situation clearly through your break-up goggles. Maybe give her some space to make this decision for herself and cheer her on, let the situation play itself out. Good luck. <3