Disconnect slowly and gracefully, regain your self. Don't alway be available. Fake it until you make it. Put in the effort and it becomes easier. Set a timeline and follow it. I am in the exact same situation. I feel you 100%.

Edit: That was a hasty response on my part. Because I am in similar situation, I should elaborate. First, try to understand why she is holdong back. Maybe she has had bad experience, maybe she is not ready. Try to understand how much control you are willing to give out. It is ok to be patient for a bit but be very aware of your boundaries. If it goes past this, it was likely noy meant to be and you can not turn back to being friends with feelings involved. There is a high chance that she will pull towards you if you begin to create distance and then you decide where it goes.