Pick up any respected poetry collection. Are there poems that go on and on about ex lovers? I'm not talking about a motif or a metaphor, I'm talking about something like:

"I remember your hair color
I remember your shirt size
I remember your favorite ice cream"

Did any of that seem interesting? No, it's a list of junk you miss. People in a similar position might find it relatable, but what's to stop that from being a blog or Tumblr post?

If you're going to be autobiographical, you need to walk a thin line between whining and writing poetry. Plath wrote poetry about her life, but she sure as hell did not write strictly about her life.

It has to be alive on its own accord, not because you're a human being there to be the meat puppet for a human idea.