This is an interesting one as I do see what she's getting at. I would say I'm still very much 'in love' with DH after 10 years – I find him attractive, I want to have sex with him, I am happy when he gets home, and lots of other 'feelings' that can't really be expressed, but I suppose amount to still having 'passion' for our relationship - little touches and kisses throughout the day, feelings I get when I look at him sometimes, that kind of thing.
In a previous relationship I loved my ex but didn't feel in love with him towards the end. There wasn't any of the spontaneous touching or kissing, the desire, the little things that made our relationship not just platonic. It felt like living with a housemate I suppose.
Of course stuff changes over the years. DH and I aren't at it like rabbits like we were at the start, we've gone through peaks and troughs in terms of intimacy after having DC, but I've still always felt that 'something' is there, that kind of spark where I don't just feel like I would about a family member.
That's not to say that platonic relationships can't work long-term though. If both parties are happy with how things evolve then that's all that matters. But for some people, intimacy, that kind of spark, a level of desire is something that is an integral part of a healthy relationship. And I imagine that's what she's trying to tease out - whether that is important to you and if so, if it's something that currently exists for you.