Is it possible my depression can cause me serious health problems?

I have had some really bad depression because i was abandoned by my love, stress from school, mistreated by my friends, and family problems. I have had liver hemmorage/failure,seizures, and breathing problems. A few months before all my drama happened I was happy and healthy. I have bottled everything up and the more intense it gets the more ill i get. And I can’t move on unless I express my anger towards the people that hurt me. What must I do?

This is exactly what happend to me. Stress and depression caused serious health problems and first thing I did was taking a long vacation. Maybe you can’t travel for a long time like I did, but there are things you not only can do but must do.
Try to avoid those stressors you can,and deal in the best way with those you can’t. Change your friends if you can and do forgive those who harmed you. I know, it’s not easy, but this is the best you can do for yourself. As long as you can avoid toxic people and meet positive, uplifting ones.
Don’t bottle things up. Necessarily have a diary and write things down! Every day. If there are people who harmed you in the past and for any reason you can’t talk to them anymore, put an empty chair in front of you and imagine the person sitting there on it, and tell that person everything you feel like.
Focus on the positive. Watch positive movies, read positive books, meet positive people. And do look for different ways to solve your problems.
Do read books on conflict managements. There are some great books on how to deal with difficult people.
Hang in there!

General Medical Information : How Does Stress Affect Health?