I have a kinda embarrassing question.....

My husband and I have been married for 4 years. Over the last 2-3 years our sex has decreased (which I knew it probably would) but now when we do it doesnt last long before he reaches his climax and he's done. He forgets about me :( we've gone from hours of pleasure to seconds of what are we doing..........I'm starting to feel as if he isn't attracted to me to enough to "pleasure" me. I have asked him about it and all I get is everything's fine I love you baby...but this is every time we have sex....

Can anyone give me some advice on how I could spice things up to make him want to last longer?