Ok there's this guy friend that I have, I like him so much and he's in relationship, what should I do? (please read the details)?

when I was 20 this guy saw my pic and asked his friend to hangout together, when i saw him , i liked him so much and he was very my type but that time I was mentally in a really bad place and couldn't do anything couldn't eat properly or go out and at that time he had broken up w his 2 years girlfriend too so that was a no for me, and then still after 3 years, I've been stuck on him, I like everything about him I don't know what to do and by the way in that mentally bad phase I stopped talking to everyone for 1.5 years and in that time he got a new girlfriend and he has been with her for 2 years I genuinely don't know what to do I try to ignore the feeling that I have because of the girlfriend but my brain won't let me, I've seen so many guys but no one is like him.

whatever he does I like and we're friends and we go out too, i love him as my everything tbh, I never flirt with him and even support his relationship that's how much I love him
Ok there's this guy friend that I have, I like him so much and he's in relationship, what should I do? (please read the details)?
Post Opinion