hurting

I geuss that I am looking for advice from anywhere I can get it. I don't really know where to turn. I am 28 years old and have the greatest wife on the planet. I love her completely and she loves me. We have been together for 8 years and married for almost 5. We have no kids. To truly understand the problem I'll tell the whole story.

We live in Sweden. My wife is a nurse and I am a medical student going to school in Poland. I am away for up to two months at a time. We are able to talk nightly thanks to Skype. (a wonderful invention!) When we are together during the summer and Christmas and other holidays it's absolutely wonderful. We laugh at the same jokes we enjoy the same things and she really is my best friend. The reason that I am looking for advice is that she has lost intrest in love making. She has always been tentative and with the exception of a handfull of times in our entire relationship she never really gets worked up. When I am getting ready to leave it's always emotional and I want to make love but she stops me. I hold her instead and try not to put any pressure on her but inside I am screaming. I told her that I was willing to wait as long as it takes and so I stopped trying to initiate anything. That has resulted in that we sleep on our own side of the bed without cuddling. I have asked her and she said that she didn't want to get me all worked up when nothing was going to happen. I told her that being close to her even without sex is good but she's still hesitant. I have read countless articles, most of which blaming me for her not wanting to. I subsequently have sole responsibility for the dishes, the laundry and cooking supper because every article I read told me what a lousy lazy man I was. I even started hitting the gym and after 3 years of religious training I am in the best shape of my life. I try my hardest to show her in other ways how I feel.
That said...there are 2 other problems. 1) She takes medication for a chemical depression, however the medicines she's on have both the lowest risk for and lowest severity of sexual side-effects. 2) She has polycystic ovarian disease. I understand that both of these conditions can cause sexual dysfunction.
I have told her that I do not want to make love if she does not want to. That is to say I don't want her to go through the motions just for me. She is so honest that I could read it on her face if she did.
Lately it's getting to the point where I am starting to feel like that part of my marriage is gone for good. I've tried to talk to her about it but I trip over the words. I always think to myself that sex is such a small part of our relationship as compared to all the great stuff we have that I shouldn't be worried. What worries me is that because she has said that she is afraid that making-out for instance will lead to sex that she avoids that too. I am losing the passion in my marriage. That hurts.
Í believe her when she says she loves me. I believe her when she says that she doesn't want anyone else. Does anyone have any advice?