Am I being unreasonable?

my live in fiance has told me that I don't "do it" for her in bed and that I should be ok with not having sex. She says that she's not saying "never" again, but that she has no sex drive. She's 34. My take is that if she loves me, she will at a minimum, at least give in occasionally. Should I end this? I'm stressed to the max and sex is a great stress reliever. She knows this, but refuses to concede. She thinks that with everything else she brings to the relationship, that I should be fine with not having a regular sexual relationship. I completely disagree. It's more about the connection to me than the actual "act". Am I nuts???