Echelon, I love you, but if you every say "some1" instead of "someone" again, I swear to God I'll smack you one

Asking people how they met, making small talk, and worrying you'll be embarrassed or uncomfortable, are all a big part of Social Penetration Theory. The less we know about the people around us, the more uncertainty we have, and the less predictability we have about how they'll react. The natural reaction in this case is to seek more "penetration" (no, not THAT kind, you pervs!). What it means is delving deeper into getting to know someone. Small talk is good for that. And the reason you're embarrassed or worried is because you don't know enough to be able to predict the person's thoughts and reactions. Getting deeper, coming to know them more, reduces your uncertainty about the situation, and increases your ability to predict the results of future interactions.
Anselm does this by asking How did you meet? He's delving for more information, learning more about the people, and thus increasing his ability to predict and reducing his uncertainty.
Echelon does this by offering his own thoughts, which prompts the other person to respond in kind. This reciprocation helps keep the back and forth action of the conversation going. Essentially, by offering his own thoughts, he is prompting the other person to react in whatever way they will, which increases his ability to predict things about that person.
Me? I was uncomfortable because I didn't know the first thing about this person. My uncertainty was high, and predictability was low. The only way to get past this is to start probing for information, or offering information about yourself. But in my case, my fear of the potential negative response made it hard for me to talk. I tend to expect not to be liked. A lot of this "uncertainty versus predictability" really comes down to the potential for future punishments or rewards in a situation.
What do I mean by punishments or rewards? Well, the punishment could be this person reacting badly, or looking at me like I'm strange. That's a big punishment for someone who fears negative social impact. What are the rewards? There weren't any from my perspective... I didn't expect to meet this person ever again. When you expect to interact with someone again in the near future, the reward would be more comfort and predictability about that future encounter.
Though everyone has their own views on what the punishments or rewards could be, these are just my perspective.
So, my discomfort and desire to go home came from the fact that with such high uncertainty, I feared the likely punishment of a negative immediate response, and I didn't see much hope for a future positive reward. So I played it safe by keeping quiet. When I keep quiet, I don't get the negative response.