"I had some girls as friends in past, because of my nature I pushed them away, they all were very good friends." Im curious what do you mean by that? You had girls as friend and its success as stuttering person. Not every girl will understand stuttering, for some its no. But you could make friends with girls and they were good friends, so for them stuttering as I think wasn't big deal. Are you was scared of closer relationship? [https://www.healthline.com/health/mental-health/pushing-people-away#signs](https://www.healthline.com/health/mental-health/pushing-people-away#signs) As stutter people we may avoid talking so we are not used to social skills, voice and his tone. So our "Hi" may be bad. She could be scaried and you may be overthinking. Yeah I can agree that voice tone matter and more natural, positive would be better. You had eye contact so she migh find you interesting but also be too shy to talk. You may train some small talk so it would look better than only Hi, like Hi, I noticed we are in the same bus for few months and we are glance at each other, you have pretty style, shoes, hair, would you like to get to know each other better, Im xyz.