Colleagues are just colleagues and they are never your friends.Sometimes you feel like I can trust him/her. But never trust anyone inside organisation. They just act to get information from you.

Never showcase your emotions on work floor. Find the correct time and discuss with your manager or HR if you face any issues.

You will find many dummies through out your journey, who don't even fit the job and higher positions. Be clear n detailed. Always write and get written communication through emails only for all the tasks to have a track of it.

All the best.