Is he hitting on me or am i just being delulu?

So a little context we met during our exams , didn't talk too much but he seemed sweet and then he asked me to share my insta id with him so that he can ask about my result in future ..

Later on he saw my highlights and there was some poetry related stuff so he asked me if I like poetry and I was like I kinda do .. and he said I LOVE poetry ... cut to few days he shares a story (with close friends only ) and it was something like pov : you belive in love but not in relationships .

Thn he posted a story where he won some literature contest so I guess what he said was true .

Anyways , me being me I posted another story which was something bassed on trust fall basically like how I was taught to not trust people blindly but with you I am willing to, something like that ( it was not dedicated to ANYONE) he replied to my story like this:-

Perhaps I am not break when I hit the water .

Falling down in deep , A blurry face piercing the darkness grasp me , I wanted to drown in that hope for a moment..

Now I freeking don't know if he is continuing the poem that I posted in his own words or is he saying those words to me ..I am Hellaa confused .

So send HELP 🥲

And if he is hitting one me . How do I friend zone him ? Because I am already in a relationship ( he is not aware of this fact) and I think this guy is sweet and we might actually be good friends.