More than one bf/gf

i had a very arguing conversation with some co-workers at lunch today

It was about rather or not something is allow to have more than one bf/gf at a same time
there was no conclusion to the topic, of course
but it lead me to think about someone
someone who hurts me really much in my relationship life
someone who taught me what kind of guy i shouldn't love

When i was on the phone with witty on Sunday,
we talked about him too
however, i admit i don't hate this guy
but i think i will never want to see him again.
no matter rather it is seeing him on the street and just say hi,
or actually having a meal/drink with him

unlike witty, i don't think i will laugh if i know he dies,
or if he has a really bad future
but if i know in his future life,
he ends up with no gf/wife
i think i will be happy,
i think he deserves that
he doesn't deserve someone good at all
or in fact, he doesn't deserve anyone at all