Tell him you'd rather wait for your mom.

"No. I'll wait for my mom. Thanks." You shift your weight from leg to leg and Seamus seems to be studying you for a moment. Finally, he shrugs and without a word pulls out of the school parking lot, leaving you alone to wait for your mother. She sends a text saying she's caught up in paperwork and she's really sorry, but she can't come get you just now. It'll be at least another few hours. Shit! Why didn't you just take the damn ride with Seamus! You kick at the dirt and send her a snotty reply back about being irresponsible. You'll just have to walk a few blocks into town. You can hang out at the bookstore or the music store. You walk along until you're in the center of town and locate the book/music store. How convenient that they are there together. You push open the door and Oh. My. God. There is Seamus sitting behind the cash register and looking at you amusedly."Your mom never show up?" For the first time since you've met him, he is smiling. You sigh and admit it. "Yeah. She uh, got caught up in paperwork and..." You shrug. Again. He nods watching you walk toward one of the sofas in the middle of the room. It seems to be just the two of you right now and he leaves the cash register to come sit beside you. "Maybe tomorrow, I can give ya a ride so ya aren't waitin' on her." His brow is cocked and the way he says ride makes you think of something completely perverted. You nod anyway. No chance you won't take him up on it this time.