What can this gemni be thinking after this.? {werid question}?

Hmm...most likely unvoiced jealousy. This Gemini you speak of probably likes this girl a lot (She is bi right?) and feels like you're invading her territory. At the same time though, she will be pive about it and act like its not even happening. If you ask her about it though, I'm sure she'll be more than happy to talk to you about it.