by myself - 自己来,自己做
rely on myself - 靠自己
nobody I can trust/nobody can be trusted - 没人可以相信
nobody is reliable - 没人可以相信/依靠
Depend on myself
I'm all on my own. I don't trust anybody.
靠自己是by myself
I can trust no one.没人可以让我相信。
There is no one who I can trust.
Depend on yourself!
I can believe nobody.
All by myself
No one can believe