The silence made it uncomfortable and Aaron found he did want to talk, he just didn't know... what, or how. "I don't know what to say," he admitted. "I know you're not judgmental, but I'm sure you... have an opinion."
Other options:
no subject
The silence made it uncomfortable and Aaron found he did want to talk, he just didn't know... what, or how. "I don't know what to say," he admitted. "I know you're not judgmental, but I'm sure you... have an opinion."