Hey dude just be calm when u talk with your girlfriend .its not only with you i  also faced the same problem as you are facing now but now i am dating with the same girl since two years.Next time when you meet with your girlfriend just tell her whatever the feeling u have and don't hesitate during the session because girls like confidence.I  can understand your feeling  that when you meet with your girlfriend you always think if i say anything wrong then she dislikes me and in future i will  never talk with her.so be a man dude and just go whatever you want to say and for further any assistance just visit. http://www.themodernman.com/ .i have also tried it and it works.