<human>: Can you condense the text into a few key points?

I am an 18-year-old straight female. I've never had a hint of a romantic relationship, much less dated anyone. Part of this is because I am extremely picky about a guy's personality, and also because I think you could bottle me and sell me as guy repellent. Oh well.

I'll be going to college soon, and I'm hoping that will open a brave new world of guys and dating. However, I have two problems:

1) I am only interested in serious relationships. Casual relationships just don't appeal to me at all.

2) I am not having sex until I'm married. No snide comments, please. It's my own choice.

So obviously I'd like to get these things on the table as soon as possible, so no one's time is wasted and/or I don't end up in a difficult situation. However, laying this out in detail to the poor guy who only asked me to coffee seems like a very good way to ensure he never talks to me again. What is normal timing for a "boundaries" talk?
<bot>: When is the right time to talk about boundaries to a romantic interest so you don't send him running for the hills?