have you told him why you want to do it?

nice pics

Haha... my girlfriend and I just talked about this last night.

I don't mind her being naked on here, but the idea of a fully nude and sexually charged SG set does make me a bit uncomfortable. If it was really important to her we would work through it, but don't blame the guy for being a little upset about the idea... there's a certain lovely romantic notion to the idea that your body, or parts of your body, are for his eyes only.

you look stunning in your pix hun
xx

The guy sounds like he is trying to control you a bit too much.

It's your life and you have to live it for yourself not for him.

Once someone gives you an ultimatum, it's time to hit the road.
If it's important to you to do this, he should understand that.
It's not about him, it's about you. He's trying to control your actions, and that's not his place in life, and he doesn't have the right to do it.
I get why someone would be bothered by the concept of their significant other doing nude modeling (not me. I wouldn't care who got to see it. I'd get to have it in real life), but the fact is, it's not like you're proposing doing porn. It's just pictures of you as nature intended. Not really a big deal, in my opinion.
I just think he's trying too hard to run your life, and from what you've written, he's not doing much to earn his place at your side.
And you know what? You're too young to be tied down to someone like that. Walk away and have some fun (which you don't appear to be having much of now). You sound like you're settling for him because of the past. Move on, and if you're as important to him as he appears to be to you, he'll come crawling back regardless of your actions. If he doesn't, then he's not worth your time. Find a guy who appreciates you more. You're pretty, and you seem very sweet, so find someone who appreciates that.

Yeah, that's pretty much exactly what she says... "you're the only one who gets to touch me." I understand that, it's lovely to hear of course... in the end like I said, we would work through it if it was really important to her, and I'm sure you and your guy can work through it if it's important to you.