TS, I sincerely feel you as I experienced this before. Remember, depression is not a disease, it's a sign that you are holding into something or been strong for too long.

Now it's time for you to let go of your old self / detach and reborn again...

How? As mentioned by others, start exercising. If you feel dreadful to start, try walking in the morning instead. Do it at least 20 minutes coupled with deep breathing in a relaxed way. Remember attitude is important and keep it PERSISTENTLY everyday.

Avoid processed foods and stick to whole foods. Types of foods already mentioned in previous posts. Drink plenty of warm water. If your central nervous system is dehydrated, stress can kicks in.

Supplement? I prefer herbs than pills. I recommend ashwagandha herbs.
http://www.asianhealthsecrets.com/ashwagan...nervous-system/

Avoid coffee. Although it stimulate your alertness, you'll feel the after effect. Try chamomile tea, etc...
http://www.ayurvediccure.com/top-herbal-re...nxiety-attacks/

Since you don't have friends, you can get some motivation books / audiobooks to brain wash your mind for the time being. You need to master your mind as it can bring wonders or kills you.
Two good books I had read so far:
1. Be happy by andrew matthews
2. How to stop worrying and start living by Dale Carnegie

If you are the kind of person who always hook to facebook, search for Elliot Hulse and view some of his videos on anxiety / depression / etc...

But at least, try start to create more friends by joining some religious / spiritual gathering. Human bonding is important...go find a bf and fell in love

This is your personal stigma my fren. You judge urself too much

I have a similar fren, its a guy btw who has this similar situation...he always complains that he is too skinny, said that all the clothes that he wears doesnt look good or fit him properly...he feels embarrassed when he goes to public places...when someone told him that he is too skinny, his anxiety starts to kick in coz he might b thinking he got illness or bla bla...