How to work things out if one's colleague has a crush on one and everyone else rolls eyes and stares even on minor interaction between them. Confrontation will work?

Act like they don't even exist. Act like even if they were dying you wouldn't care. Act unbothered.

Try it .you'll know it

Yeh office hai ya dating centre 🤷🏻‍♂️😂

Crushes are so useless.
Either get in a relationship or dont. Phattuon ki tarah crushes kar k kia milta hai?

Abandoning is the solution

That is why it is important to keep your feelings private in a work environment and maintain the highest degree of professionalism. No, confrontation will only confirm your true feelings and provide fodder for further gossip. Keep minimum contact with that colleague for a while until people's interest fizzles out.

Yep... Go talk to each other...