“I am alone,and this loneliness is killing me”, is a quote, quoted by someone that I happen to read on the internet

Is the sentence after the quote correct? What I’m trying to say is that I saw this quote on the internet.The quote is not the problem, but the sentence after the quote I wrote is it correct? So when people read they can understand what I am trying to say, especially say, If writing in a blog or journal.

If the sentence is wrong, how you put it?