When a girl sits down on your bed?

So a girl that I've been crushing on for the longest time offered me a ride home the other day. We get to my house and I invite her up to smoke some weed. She says yes. We go into my house. I go into my bedroom. She follows and sits on my bed. I didn't tell her to do it, she just sits down un provoked. She says I have a nice room.

I kinda feel like I missed an opportunity...
But there will be others. GAGers, what do you think?
When a girl sits down on your bed?
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