Luck for my partner: Male born 5th July 1989

Is his unstable emotion caused by stressful work?
If so, you can suggest him have more communication with his colleagues to get a harmonious work environment. This would help him to have a joyful emotion, which would also be good to his health.
You are advised to talk to him frequently to learn how he is doing and what he is going through. Give him some advise. Show how important he is to the family would also make him confident. :)