I love this poem, it's flow and theme are all pleasing.
You begin with defining words in the whole stanza. Forbidden love, lust, secrets kept and always trust.
^
This holds so much weight and sets the scene for the rest of the poem.
Fobidden friends...and that one lie!!
^
This one lie jumps out at me as being very important. Lying can ruin a lifetime of trust, it can penetrate the uninpenetrable, even love!!
Forbidden conversations, always remember those times we had.
^
Sounds like a farewell to dialogue that will never be repeated again, friends no more!
Forbidden memories, forbidden today and forever..
^
This is so final, so definite..there is just no way back.
This poem is filled with painful regret and brimming with sadness. Although it suggest a relationship of 3 and because of it a air of seediness, it is still very sad to read and makes the reader feel sorrow for the loss of a great potential love that never reached its hights.
Well done on this poem and welcome to the club. :)