How can i get my boyfriend by talking dirty to him on the phone?

Honestly. It's not that hard to arouse a guy. Just be confident and be yourself. You're overthinking it and that probably comes off as forced and uncomfortable. Like you've said, he talks dirty a lot of the time; just respond. And when he says your not romantic enough, I'm pretty certain he doesn't want you to randomly be like "enter me." Just tell him that you miss him, and if you're up to it, go into a description of the more physical things you miss.