How do I stop liking someone if their in a relationship?

I’m in love with a guy, he’s in a relationship but he inspires me to be the best version of myself and I’ve never met a guy who has such an amazing personality and strength in character. I see potential of what could have been. Back when he liked me and wanted to date me id just come out of a relationship so I turned him down.
And now 2 years later he’s in a relationship but we’ve spoken here and there, he calls to check up on me. I’ve never met such a high quality man that’s what’s tripping me up even more, and I struggle getting him out of my mind. Is it appropriate to block him in this situation so he can stop checking up on me because when he does I start thinking about him, us and he always impresses me every time. I’m sick of it 😅
How do I stop liking someone if their in a relationship?
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