Is it time to leave this sexless marriage?

I am a 44yr old female married for 15yrs .My husband is great in many ways but when I initiate sex he implies that I am oversexed and demanding.This leads to me feeling dirty and ugly and very depressed.Is it time to leave?

You shouldn't feel dirty about this, because a good sex life is good in a relationship especially a marriage. Like stephanie said, talk to a sex counselor. Hope it all works out.

Even though I've obviously never been married.
I think you two should sit down and talk to a sex counsellor. If he doesn't want to take part, then there is a problem. You should be able to talk to him about things like this without feeling dirty, ugly, depressed, etc.

No, sex is not a reason to leave someone, if you love this person, you will work through thick, and thin with them, I would consider you going ahead and talking to him about it, tell him how you feel... he is your husband.. goodluck.