I love the erratic-ness to this poem.
^^ The flow was sketchy but fit the theme.
I like also, how it seemed as though you were writing this as you were realising it. Realising the pain, the hurt at him loving someone else.
In my opinion, he is not worth it - as he doesn't treat you as you deserve to be treated. No one should be insulted and abused by those they care for. It's unhealthy.