Leo guys are expecting something more than just a "chat". You should give more attention or being more aggressive, cos Leo tends to be shy and careful in getting along with you. He's interested indeed both on your physical attractiveness and the fact that gemini's smart and playful. When he commits himself to build this relationship, he's really into it.
My advice is, if you're really interested, show a little effort that you're into him and interested to get a long with him. But if you're not, get rid of him, otherwise he'll hurt more than you think. I've been through this kind of relationship with a Gemini girl. I realized that Gemini girls can be bored easily.SO you if you're into him, you should probably stop acting like you don"t care or not interested. MAke your move, but not too aggressive so that Leo won't expect more that you expect in this relationship. Leo tends to be a jealous person but not possessive. This is a two different things that you should take a good attention to. Do not flirt with other guys when you're dealing Leo, cos Leo will get jealous, but in return Leo won't be a possessive boyfriend. LEo will appreciate and support everything you do as long as you're showing that you are a true loyal girlfriend. When thing go great for a while, then you guys will make a perfect match.
That's all I know from my experience. GL!