I get it, but you just need to drum up the courage and go talk to that girl. If she's open-minded your speech won't be an issue. It sounds easy and I know it's not. But man, I get it. I went through it. I even had girls show interest, even ask me out, but my self-esteem was so shot that I thought that, even though in hindsight this makes absolutely no fucking sense, they'd be embarrassed to be seen with me. They came to me... Fuck I was an idiot... lol Now, I've been married for nearly 20 years and have two beautiful daughters, all because I went out of my comfort zone and spoke to that girl. My stepdad was a real arsehole and poked fun at me and showed no patience, I had kids and school make fun of me, it's just something that some, if not all of us will go through.