"I'm going to meet my friends and will probably be out all day. I'll keep you updated, though."
"All right, have fun!" she says. "You feeling okay? People aren't being rude to you, are they?"
"I'm fine, Mom, promise," you say. If you tell her anything else, it'll just upset her and she'll be concerned all day while you're gone. It's better if you just pretend that everything is normal.
"Oh, wait a minute," she says, and walks over to a group of boxes on the floor by the kitchen. "Before you go, I want you to take a look through these real quick. I'm trying to clear out the house a bit. This will all be given away or thrown out. Is there anything that you absolutely—and I mean absolutely—need to keep from here? Don't just take something for the sake of taking it."
There's a box of books, and in the clutter you see some titles from the Paranormal Maine series. That could be useful if you wanted to learn more about the local legends. One box has an old soldering iron and the tools that go with it. If you wanted to help your mom out, that would be useful. Then there's a package of unused mousetraps. Maybe you could use those to rig up a tripwire to keep Ennis from climbing through your window. You almost laugh at the idea, then realize that might not be such a farfetched scenario after all.
Your mom stares at you skeptically, apparently already convinced you won't need any of this stuff.