Would you tell a friend's you have feeling for them ? I would like to have both opinion's (Yes and No)

Hello Everyone.

I'm actually in a long friendship with someone. Over 5 years now.

I saw this person being in a long relationship (7years, started before we met), breakup with the person and start over a new relationship.

I never thought anything would happen between the both of us.

Either because she was not really my style, she was in a relationship, we were not having fun on the same topics, ...

And also because I was not really mature, I was focused on other projects, ...

Yet, after some time, feelings from my side started to grow. Of course, at first, I hid them deep down my brains and continued like nothing existed, but it took more and more places.

I know that she doesn't like me the same way and never will.

Also, she met a new guy and started dating him. Things are going well and I'm happy for her.

I'm also moving to a different country quite soon. So we may not see each other for a long time.

And my main goal is to be sure that she is happy. Not having her loving me.

I'm curious about the opinion of everyone.

Since you know there is no benefits for you or the person to reveal those feelings, would you still do it ?

Would you keep it to yourself only to not harm the other person and carry this weight alone ?