Is he trying to flirt with me?

There is this guy I'm friends with. We joke and banter a lot. We sometimes pass each other on the way to work and from work. Last two times he texted me to let me know he saw me. Today he texted: "morning... first encounter...*the place he saw me*" I answered: "how come I never see you😢" and then he said: "even if I don't see you, I feel it when you pass🤭😊".
He tease me how I always have sex on my mind and that I smell great then.
Before he would end that kind of text with this emoji 😂. Is he changing from joky to flirty mode.
Is he trying to flirt with me?
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