Cups (Water) and Pentacles (Earth) are both slow and passive elements--as is the High Priestess. I would read this trio to say this man feels an unspoken connection (High Priestess) and emotional bond (Queen of Cups) to you, but will move forward steadily and platonically for the time being (Page of Pentacles.) He is not yet thinking about you in a romantic way, if ever he will. But if he eventually does develop those kinds of feelings it will take a good amount of time for them to grow.
So, right now: platonic.
Edited to add:
Is he currently involved with someone else? That queen in the middle could be someone who stands between you two at the moment...someone he may be keeping secret from you (High Priestess.)
He may feel more like a child, immature or clumsy (Page of Pentacles) in relationship to you as a mysterious, spiritually-oriented, imaginative woman.
Do you or does he have any children? For me the page of pentacles always means that my children come first and will always influence the relationship.
"Just" platonic?
When Plato discussed relationships (and I assume that's why we attach his name to these things), he said (and I paraphrase, the book is in the other room), that the highest bond between two people is a true meeting of minds alongside a meeting of bodies.
That doesn't sound like a non-sexual friendship to me, it sounds like a relationship where people actually like, respect and know each other on more than just a sexual level. We should use Plato's name to describe the relationships he described, not a non-sexual friendship - what's wrong with saying "just friends"?
