You may be very concerned about someone's wellbeing and would like to see them have counselling. But it really is best if the person in question can reach out for support themselves. We are able to take enquiries from you on behalf of someone else, but you should have their full consent.
If you really feel you must suggest counselling to someone, do it in as calm and private a moment as possible. It's important you express your concerns in a judgement-free manner, and backed up by facts over hearsay. Make it clear you support him or her and merely want to see them be helped in feeling better. Then leave them to make the decision for themselves.