I don't think he's Unattractive

So I have a problem... my boyfriend and I when we first met, we had amazing sex that felt really good, and he's very very attractive, but he went to California for a month and he wants to sext constantly. Like every day. And I'm usually down for sexting, but idk why I feel different but he just doesn't turn me on anymore with pics. It's like watching porn the same thing gets old, real life feels best. How do I tell him that without him thinking I don't find him attractive? :(