Almost- why don't you strat your own thread? 
I am going to be blunt- sorry.
I don't think your wife loves you. If she did, she would be willing to address this issue and seek help.
Whatever her emotional hang ups are- she is putting them first.
I'm afraid i think you should end your marriage before your self respect is eroded any further.
Just another line though first- women avoid sex for several reasons: emotional distance from their partner,
lack of sex drive per se,
underlying resentment ( ie he doesn't help around the house, he isn't intersted in me, he just wants sex),
physical or health issues,
OR something about the man that turns them off- bad breath, horrrid teeth, BO, poor sexual technique or selfishness in bed.
if you feel that none of these except perhaps the first apply to you, then maybe you need a very serious talk about separating.