No, once you know it's not going to happen you need to do what you can to let the idea go.

Holding into it is just tying an anchor to your happiness that will only get heavier.

No, it is not healthy and will go nowhere or could turn into an obsession in the worst case scenario. It is better to move on and find someone who is interested

Don't do that to yourself. You need to move on.

As a pure act, I can't see that it causes any harm.

However, it will very likely lead to frustration, anger, and poor treatment of the person in question. Those things are bad.

In what reality would that be a healthy thing to do?

No. I know it hurts, but you need to let go.

If you can't help it you can't help it. But you should try and not do that because its a painful place to be mentally.

"Should you" as in "is it morally/ethically wrong?" No, it's not. "Should you" as in "is it a good idea?" No, it's a terrible idea. And I think you know that on some level.

as everyone here has stated, gotta let it go. the good news is: 1 down, billions more to go! just have to get out there and meet new people that will respect the amount of effort you put into caring about them 🙂

good luck!

I don't believe in the idea of "thought crimes" so morally you haven't done anything wrong. But its probably unhealthy to do that.

You're allowed to THINK whatever the hell you want.

The point is in keeping it to yourself an act civil.

No, nothing helpful will come from nurturing that fantasy.

A relevant proverb I heard somewhere on a similar topic: You can't prevent a bird from flying over year head. But you absolutely can prevent it from building a nest in your hair.

No, it is not good. For the one who fantasizes that person (frustration, anger, jealousy, sadness) and then the other person (fear, mistrust). There is more than 8 billions people on earth. So, countless possibilities for connection, friendship, and love 😀