Thanks for using health care magic for posting your query.
I have gone through your given history in detail.
In your description yo have mentioned that your friend has depressive symptoms. He need not wait until he has a complete breakdown. He can still visit a psychiatrist
who would like to manage him with problem solving therapy and cognitive behavioural therapy.
As far as abuse is considered, it is very very common and yes it can lead to future personality problems.
Until he gets an appointment motivate him to start a morning exercise regime, it will help him a lot.
Hope I am able to answer your concerns.
If you have any further query, I would be glad to help you.
In future if you wish to contact me directly, you can use the below mentioned link:
Wish you good health,
Dr. Srikanth Reddy M.D.