A surprisingly common problem. My partner and I also have this issue but he is the one with the lower drive and mine is higher and yup, it can be frustrating!
Couple of things:
Firstly women get turned on mentally, males visually (I am generalising here, for quickness. Every person is different) but as one of those aforementioned mental women (giggles) I can tell you that there is a huge difference for a woman between the physical and the mental. I have noticed when men have made moves on me over the many manyyyy (Okay, not that many) years that I have been sexually active, it has mostly always been physical moves, touching, kissing, groping or visual moves like getting naked, or sending cock pics and if they do try to tease my female mind, they do it in the way THEY would like to be teased (I guess) my talking about physical things (Their penis, how hard/big/satisfying it is, or about how they intend to slot part A into part B for hours or...well you get the picture)......BORING! Okay, slight exaggeration, it is not boring guys, but did you know that if you tried to turn her on her way, you might go from an okay reponse to an OMG fuck me now! response? Women need mental switches pushed, before their arousal starts and never giving her that and always going straight into the same old same old fit part A into part B will get old quickly. I guess you could compare it to you, as a male, trying to reach the height of horniness and orgasm with NO visual stimulation at all...ever, and then one day, your lady does that amazing strip tease (visual) and woah...suddenly a lot more horny. Anyway...you get the point, so how can you get into her mind.
Well, it takes a little efort and work. Surprisingly I have known a few guys for whom it was too much effort and they still sulked as to why their ladies had little interest, but yeh, it takes a little work, but it should be fun for you too, knowing how much you turn her on.
Another issue (and it ties in with all the above) is that women are sooooo far away from "that" place, mentally, when they crash in bed at night, slipping off their comfy "around the house" clothes after spending all day being mum, cleaner, cook, taxi service, problem solver, nurse...all the rest of it. Now, this might be where guys wonder why women are always tired and men are like "Well I work my ass off all day too and I still have energy. I don't think it is 100% about the physical and mental energy and more to do with being in the right frame of mind. In other words, it is not easy to switch off those switches in our heads, labelled cook, cleaner, nurse, problem solver etc and then switch on the 'sexy' and 'lover' switches, and I don't know how other women feel but I find it even harder if all my guy does to get me in the mood is grope at my tits and feel if I am wet yet. I need something going on mentally and I don't think I am the only woman who does. You need to begin flipping her switches way earlier than 5 minutes before sex time. Like...during the day or as the evening gets close.
If I were in your shoes right now, I would stop pestering her for sex, if you are (Waiiiiiit, here me out) because, you see, this mentality stuff is powerful if you get it right. I would instead offer her things like a massage but tell her no sex, just a massage. You have to stick to the no sex thing, otherwise it fails at the first hurdle lol. Then in the meantime you tease her with the odd risque text, give her surprise cuddles and kisses for no reason, nice gestures that show you love her etc etc. Okay, so the idea here is you are putting little nuggets into her mind that as well as all the other stuff that she is....she is also a desireable sexy woman. In other words, make this fun, make it a game you can play together and let her come to you.
I know nothing that turns me off faster than a guy who thinks he is owed sex, on some kind of timescale, like "Well, we haven't done it for 2 weeks now" kinda thing, because I feel...used I guess. What if I need something else? like a rest
Men may think that the romance and wooing stops when you get comfy together but I am here to tell you that when you stop making efforts...well....you get what you give! No matter what side of the coin you are on. You say that everything outside the bedroom is great, which is perfect! It gives you the opportunity to go and stir that pot inside her head and get her thinking of you in sexual ways again. Things like surprises, keeping her on her toes, teasing her, creating more affection during non sexual times etc. All this will help. If you are really confident, you could communicate and find out some of her fantasies and with knowledge comes power....to tease and keep her arousal high. Life takes over us sometimes and we let other things slide. It sucks!