Why would a guy keep you as a platonic friend / colleague?

Hello,

There is a guy I've got to know in the past months. We met 4 times, he often reaches out to me on social media.

We sometimes have long chats.

He lives very far away and we only meet if it is circumstantial.

Last time we met we went to his apartment and he was very sweet, there was not even a sign of him wanting to do something.

I know he would never make any advances.

Last evening he said that I'm tge only person he knows who is honest, smart, makes him laugh, who has all these qualities and that he found me attractive.

Also he said that he was cautious about how I feel and that he would only like to be platonic friends.

He made it clear many times.

At this point I don't understand why he wants to keep me around as a friend only?

Tl;dr a guy friend M36 said he only wants to be friends with me F29.

Why would he want to keep me as a friend?

Why would a guy keep you as a platonic friend / colleague?
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