Hey sis, sorry you had to go through that.. It sounds like what that guy said really traumatized you and hit you to the core. I think you might need therapy with a trained psychologist and you need a strong support group. Do you have IRL friends who you can talk about this with and unload on? You need to untangle all the knots that those words that guy said. You may have PTSD from that experience since you're lips tremble when people talk to you. That type of physical reaction in response to outside stimuli can be an indicator. Also I should say, or I guess point out the obvious, that that individual is a horrible person and is seriously lacking in empathy. He's got his own internal issues to sort out. It's less about your stuttering and more about his personality and how perceives life and other people. There's plenty of people in this world who don't care that you stutter and would be happy to be your boyfriend. So when moving through the world, it helps to keep that in mind.