Should I be cold to Gemini girls? She doesn't talk to me much now. ...

Never, both children are slow-heating girls, if your perseverance is not enough. I advise you to give up before it is too late. Slowly influence her, let her know your heart, and don't let her ignore you. If you ignore her, you will be directly banned, even if she ignores you. You can't ignore her. In that case, she will only be sad alone. Gemini doesn't want others to know that she is sad, so even if she likes you, she won't tell you. When you slowly enter her heart, she will tell you everything. Take your time. Let's go