Two things:
--Just to weigh in, I love all kinds of porn (and not necessarily romance novels or soft-core stuff), I look at it alone, and my bf refuses to. But he has ways of releasing his sexual energy that I don't quite relate to, so que sera sera and vive le difference. Porn is just sex minus intimacy. It's a dirty industry, but there are porn sites that just focus on amateurs or erotic stories, and I think these are ethically sound and don't objectify women so much as play with hard-wired fantasies.
--weren't you the gal whose boyfriend didn't want to commit because he believed in uncertainty? Sorry, I don't have time to go back and look for that thread.
But it seems like this porn thing is a red herring. I think this has to do with feeling abandoned, or rejected, or not loved for who you are.
Here's where
The Work and
EFT can really be a support in examining the beliefs behind the pain.
As another poster mentioned: it's not porn, or your boyfriend, that's causing you pain, it's your own thinking.
Be gentle with yourself as you explore this stuff, and know that you can come here and vent if you need to!