Sounds like you two need to sit down and talk. It could be monotony that could be issue here and you might need to change something up regarding to sex. Also it can be due to physical attraction between you and him. Regardless of what it is DO NOT blame yourself for anything. This is not your fault in anyway. As a woman you have needs and from what you have described he is not meeting them so let him know that.

Has he had his testosterone levels checked? Lack of sexua| desire is very common with this and low T is very common for men as they age.

Don't take it personally, that's what happens in nature as males and females age, and as the relationship ages. Contrary to popular belief (in the US especially) love and sex are totally different things - they can be related but still they are totally different experiences. As a matter of fact the term "make love" is very misleading and just sets people up for problems and disappointment - it says "he doesn't LOVE me unless we bump our private parts together". Call it what it is - "having sex" - so you don't set yourself up to blowing it out of proportion if in fact his desire to bump private parts together decreases as it surely will like with every other male on the planet as nature intended. Nature bumps private parts together to make babies. Nature also gave us something else called love which is much much harder to find and experience and is far more rewarding don't you think? If you can agree that "making love" is not in fact "having sex", what is your definition of "making love" now? Does he still give you that?

There is discussion group called I Live In a Sexless Marriage with over 20K members and reading those stories will help you a lot

This is an older post, so I may be too late. All the answers you got were good ones....but I picked up on how you said this has been going on "over the last three months". That is very sudden. I think your husband should not only have his testerone levels checked, but he should have a full physical...and he should tell the doctor about his sudden lack of interest in sex.

Is your husband a "gamer" (video games)? does he spend a lot of time on his computer. He might be getting his fill thru porn. Also Gaming takes up those precious few hours at night. Try making love in the morning.

I'll be blunt, a lot of women get lazy when it comes to making a guy cum. Guys like their cocks sucked, just like women like their clits licked to orgasm. It takes work, it takes a drive to succeed, it takes committment. I guarantee the world would be a better place if women, well into their marriage, would concentrate more on orgasmic sex than housework or other drab things of marriage. Guys want sex and they want it hot. Wives want the same thing, too, but after all the other things have been done. Sex for women in 15 year marriages is typically not hot. He's probably bored with the sex you offer, if at all. If you are in shape, dress sexy like you say, and give great head and screw him silly...you won't be in any trouble, believe me. When I talk to couples with their guard down...you'd be surprised how lazy basic dating sex technique has disappeared from their lives.