You didn't know where that idea of using a truth serum came from, but your boyfriend definitely wanted that to happen. And you naturally accepted even though you weren't fond of his little games ; he wasn't someone who takes "no" as an answer.

The both of you were then in his dorms, sitting on his couch while he brought two syringes of truth serum : one for him, one for you.

He explained.

"We'll both injected to ourselves that liquid, with the truth serum in us, we won't be able to lie, then we'll start asking questions to each other, knowing our answers will only be the truth."

He pauseed, the syringe close to his arm when you do the same.

"Ready ? 1,2...3 !" and then both of you inject yourselves the truth serum.

"Ahhh, good. You can start with a question and then I'll do the same..."