I'm sorry for what you were put through. However, you put what you went through on this article when it has nothing to do with it.
Please re-read the article. If you take the time to read it for what it is rather than what you want it to be, you'll see that it is not about anything longterm. In fact, you'll notice that it specifically states that ghosting is acceptable if you've gone on only one or two dates with someone.
While what that person did to you is wrong and hurtful, it has nothing to do with what I wrote. And if you think that ending things after just one or two dates is even remotely the same as ending things after 18 months, then I would like to gently suggest that you may want to consult a therapist to see why you feel that way. There's a huge difference between the two situations and your reaction to them should be just as different.
Please know that I say all this with kindness and no judgment. I realize tone is hard to read sometimes and I want to be clear that I do not mean any of this with any disrespect or unkindness.