I'm glad you've written why you think you are a coward because most sensitive people are too if it is a way to recoil/run away from pain and suffering.
So cheers to cowards! It just means you are sensitive and a decent, loving person.
We have no way of knowing how others would cope with your deal of the cards in life, so let's not worry others for now because the person who is important is you, no one else.
So please, no comparing how others would manage unless there is a strategy of coping you would like to try that you have seen others use.
I'm so sorry you are crying so much but you are not alone anymore, so don't feel you are alone. Just make sure you have enough drink so that you don't get dehydrated.
As for feeling dizzy, please make sure you have enough iron in your diet because a lack of iron can make you feel horrendous. Could you eat a boiled egg daily and also a banana?
I for some reason feel more energetic when I have those so I want to share them with you!
I have a tip to share with you on bulimia which I heard on radio 1, an old dj said he wanted to eat and eat but took a tip from the Wine tasters who are able to get the pleasure from tasting many wines because they don't swallow any of it.
To get better emotionally and physically you need to be kinder to yourself from now on, as all the bad things are overwhelming your head and body. Can you identify these bad things? Possibly write them down?
We need to be clear who these 'enemies/viruses/bacteria' are because they are causing you a lot of distress. We need to identify them with an aim to isolate them and eventually zap them for good!