This is so insightful, I can feel your pain without sounding too cheesy! The honesty within this poem also really speaks to me, I think that's why I feel I can relate with your pain even though I doubt I've ever been betrayed like this... I really like it... Or dislike it because of the pain in it, but that's why I like it. Confusing... ha :)

The rhythm is a little awkward but we live in an age where there really is no need for form and lack of form is - well - form! So, I won't criticize their but, personally, I found the overall structure a little choppy.

But, in terms of expression, I think you did a good job of it. Clever rhymes and you definitely allude to a seemingly very personal part of your life and relationship with this person. I think you could have gone a lot deeper into your feelings here. This seems a little more like an attack to me but I have written poems like these in the past and I can put myself in your place and see what state of mind you were writing in. So, even if the words or vague and simple, I really get a sense of how you feel about the situation.

Basically, good work! Keep the expression thriving and truthful, keep yourself real and I hope everything works out with this friend and all that is going on in your life. Keep writing.

Peace Love