I talked about my Ex-Girl friend to my present Girl-Friend, from next day she is not talking to me, What to do now. I am feeling sad.?

I know why is she doing that since I am a sensible girl. Maybe you talked in a way that made her feel like ur ex is still important or like u didn't forget her and it hurts to know that ur lover is still remembering their ex. I remember when I got really mad and upset at my ex bf because I asked him to explain why he broke up with her and he seemed as if he was still sensitive about her. Just talk to her and reassure her. Those feelings of jealousy u can't really control if u love someone.

Why would you do that?

Maybe what you said upset her message her and ask her what is going but at least you know now not to bring it up again.