Maybe try sex therapy - AASECT :: American Association of Sex Counselors, Educators & Therapists

She is clearly in the wrong calling you disgusting and a pervert. She is also wrong when she claims that she loves you more than anything, because, normally, people do not call those whom they love more than anything "disgusting and perverts". To take it a step further, polite, nice people do not call ANYBODY "disgusting and perverts" for wanting conjugal relations - ANYBODY includes ANYBODY and not just people you "love more than anything".

There might be all sorts of reasons for her not wanting to be intimate (although it is a bit weird since she was very sexual with you in the beginning), such as depression, pharmacological agents, some kind of a trauma, location of the stars, global climate change, and if she were to share those reasons with you, you might be quite sympathetic and understanding, but there is no good reason for telling you that you are disgusting and a pervert - that behavior is completely inexcusable.

I hope that if you realize that her behavior is completely inexcusable and demeaning to you, you will regain some of your earlier productivity, confidence, and self esteem. Since her case is pretty extreme, it probably is hard to change her ways and predilections, but, at least, you should not blame yourself for anything and should not internalize her insensitive, unkind, and rude remarks.