Yes, talk to him, then manager in that order. Be calm, explain how their behaviour is impacting you negatively, then listen. If they won't acknowledge that th

Yes, talk to him, then manager in that order. Be calm, explain how their behaviour is impacting you negatively, then listen. If they won't acknowledge that there is a problem, or they are hostile, then take it to the manager. Do not get sucked into an emotional argument with them. Explain, listen to response, and then thank them and think about what they said. If you are not satisfied and think you cannot resolve it further yourself, take it to your manager. HR is last resort. Manager should do that really if required. If they can't help, then it is definitely time to find a new job anyway.