I'm writing something and I know that if someone wants to add some ideas or phrases after the sentence finished, we could do it by adding one, something, which. So, are the sentences that I've written all right to use in a conversation situation? and here's a context.
" One of the happiest moment I’ve had was when I was doing something enthusiastically, like a contest, a relationship with a girl, studying English. If I look back, whatever it is, the happiest moment is when I find myself enthusiastically doing something. It is only when I’m doing something enthusiastically that I can feel alive. "
But sometimes it is hard that I’m in a state of being enthusiastic, one that I really want to be in.
But sometimes it is hard that I’m in a state of being enthusiastic, something that I really want to be in.
But sometimes it is hard that I’m in a state of being enthusiastic, which I really want to be in.
But sometimes it is hard that I’m in a state of being enthusiastic and that's something that I really want to be in.
PS. here, one, something, which, that means the state of being enthusiastic.