It may be just a vent, but there is some great emotion in this.

You portray perfectly the feelings at the start of the realtionship, to unfortunately it fizzles out,
'everything i said was taken seriously'
this line suggests to me that he was looking to cause arguments. (I may be wrong)
The ending was a little downbeat, but hey this is a sad poem, so I guess it should be.
Thanks for the read.