Not interested anymore and because his jealous gf doesn't like the fact that he had a modelling profile and he'd likely had it online for a long time before he met you if he was wanting work and looking for photo shoots. Course he is going to befriend other people who are in the same profession...it's how people get contacts for work!!! Naturally he would also have photos on this page, showing himself in differing settings and clothing and yes, underwear or even naked....he was trying to get work and a model needs to have a portfolio with many different looks.
And your idea to have a modelling profile wasn't mentioned by yourself and because you are looking to break into modelling, but because you are unhappy with his line of work and to spite him and to piss him off into taking his down. An ultimatum of kinds.....'Either you take yours down, or I will put one up'.....
And he's likely to be keeping it a secret, because he knows that you don't like what he does. He shouldn't have to be going behind your back and he wouldn't go behind your back and if you could be accepting of his line of work. And if you can't, then look for someone who isn't stripping off online.