This is resolved, guys. Don't know how to delete a post or I would.

*** Moderators note, this is why I hate it that they can edit their post. The issue here is that they got good answers, most likely no what they wanted to hear, so they edited out post.

It was a long distance relationship, they where having internet sex using skype, but he was also watching other porn and she did not like it.

I stopped reading after the second line when you contradicted yourself.
1 you have no problem and understand it
2. then BUT, you understand it for everyone buy you and him

So if would be OK if you were living with him ?

3. He lied because he knew you would not understand, which you don't
4. He used porn as a fantisy or a break or at 3 am when he would not call to bother you

I need for you to read how condesending you are on porn, you have ideas and don't want him to do it, you see it as cheating and it is not.

You need to tell him you are sorry and that he can watch it if he wants, you will not say a word
*** then don't say a word, don't ask , just drop it.

Part of you comes across as OK with it -- understanding that guys watch porn, and another is very NOT OK with it -- maybe he's responding to your insecurity whether you think you're letting on how insecure you are. -- And because he doesn't want to hurt you - he protects himself by lying.

Could this extend to cheating? Maybe- but that's a big LEAP!! Work on your relationship and you will have open communication. Getting over your trust issues and insecurities, though, is your job - not his.

Also - he might "lie" because not every guy likes to talk about porn and some feel guilty/weird about it. Maybe he's not comfy discussing (or being honest) that sometimes he just wants to "look at it" and get off without having any kind of interaction or emotional connection... when you connect via skype - that's an intimate connection. Porn is not an intimate connection...
A few minutes on the internet and you're done. - it's tension release.

The actual problem is not that your boyfriend watches porn, but that you are unreasonable and have unrealistic expectations for a long-distance relationship.

i asked him if he watched porn once in a casual conversation, not cornering him or anything, and he said no. i was basically like 'all guys watch porn, i don't believe you'
So, you manipulated him and then got pissed when he lied. Completely irrational thought here.

why wouldn't he just come to me?
Are you available 24/7? No? That's why. According to your post, he already told you this. Seems like you have trouble accepting his answers.

i don't blame him for watching porn
Really? 'Cause that's exactly what your post sounds like.

...but watching porn was fine. the more i think about it, though, the more it bothers me...
So... which one is it? You need to be honest with yourself. Your post is full of contradictions.