Sassy parents?? Or man slut??

So, I've been talking to a guy I had a one night stand with on st.Patricks day. Had no intentions of ever speaking to him again and he found me on Facebook. Gorgeous guy. He is actually extremely funny and sweet. I've been driving an hour and a half almost every other day to see him. Turns out I'm pretty into him. When I met his parents they didn't bother to catch my name, or even really say "hello". Mind you, I'm 18, he's 23. His parents don't know this.