Poetry is just not my thing

I thought the poem "When we two departed" By Lord Byron was intriguing. The poem was left open for so many different interpretations much like a painting. I think it was about the death of his mistress.In the verse
 " A shudder comes o'er me
 Why wert thou so dear?
 They know not I knew thee,
 Who knew thee too well:"
I intrepreted it as he was at the funeral of his mistress and everyone was trying to figure out who he was and why he was so distraught over her death. It then goes on to say "Long, long shall I rue thee, too deeply to tell", this is suggestive that he has wronged her in some way. Maybe he kept her illness a secret from him, or he found out that he was not the only man in her life.
The last verse makes you think that she didn't die and that she chose her marriage over him.
"In secret we met
In silence I grieve
That thy heart could forget,
Thy spirit deceive.
If I should meet thee
After long years,
How should I greet thee?
With silence and tears"
If you read the first verse it sounds like a first love that ended, and he would think about her for the rest of his life. When they see each other again those old feelings emerge and he was never able to fully move on. He loved her his whole life even though they both moved forward in their lives and married other people.
"When we two parted
In silence and tears,
Half broken-hearted,
To sever for years,
Pale grew thy cheek and cold,
Colder thy kiss;
Truly that hour foretold
Sorrow to this."
That's what I love about this poem, even though you don't know exactly what it is about you do know that it is of heart ache. I beleive we can all relate to the grief you feel when a relationship has ended.
Word Count : 329