"No— just listen, the plan; it's dangerous and you're not..." He trails off, biting his lip. "You can't come, you'll get hurt if anything goes south." He says as he puts his flannel on, getting ready to go.

He's right, even if his job is just shutting off the electricity. Everything usually goes south with his plans, and you've only known about the supernatural for a handful of weeks in contrast to his multiple years.

He doesn't want you hurt for no reason. It's safer to stay behind.