Yes. Please read the following article. 2/3rds of the way down, "Dietary Supplements."
Clinical depression - Wikipedia
Antidepressant - Wikipedia
Inositol - Wikipedia
It sounds like you may also experience
Anxiety - Wikipedia
Social anxiety - Wikipedia
The steadfast refusal to see a doctor and the mistrust of other people indicates that there may also be a mild form of a personality disorder. Possibly Cluster C (anxious or fearful disorders).
Personality disorder - Wikipedia
Please, I am not diagnosing you. I do not know you. I am simply providing a direction so that you proceed with research in a productive efficient manner.
However, I do believe the following. Unless your attitude about asking for help changes I expect that results in this endeavor will be roughly equivalent to going out on a blustery day and p*****g into the wind.
Most psychological problems in life have a biochemical cause, but people are very complicated creatures. In order to successfully improve oneself you need to address all aspects of your life. Diet, exercise and social interaction; just to name a few.
Since you have a problem with doctors I suggest this book. Natural supplements are given just as much attention as pharmaceutical medication.
Healing Anxiety and Depression: Daniel G. Amen, Lisa C. Routh
If you do not like the idea of medication then you must first look at your diet.
The Truth About Food: What You Eat Can Change Your Life:
Jill Fullerton-Smith, Mehmet Oz M.D., Mehmet C. Oz
Also, nobodyinparticular, he does not know what he is talking about. St. John's Wort does help mild depression, but it is not without side effects. The article that nobodyinparticular links to is a political trick by big pharmaceutical companies. To the best of my knowledge no one with any credibility has ever claimed that St. John's Wort was effective at treating moderate or severe depression. It will only treat mild depression effectively, but it usually does so with far fewer side effects than any of the SSRI medications. This is why the researchers did not test it with people that only had mild depression. They knew that most SSRI's would look bad in comparison. One other thing. The first few SSRI's on the market also failed to treat moderate and severe depression. It is only with the release of Lexapro that many people have found relief from more serious depression. The Wikipedia article on depression provides a link to St. John's Wort that is objective.