I'm scared to talk to girls because?

[Drizzy]

Last year in school, I liked a girl name Gynea she, and I was way too shy to talk to her, so I started stalking her, and her friends, and I was blocked by them on facebook, because I wouldn't stop messaging them. I was throwing loves notes at her outside for lunch. I kid told me where she lived, and I made a love note with her house address on it. I made it with PowerPoint, and I took a screenshot of Google earth showing her address and gave it to her. I've been telling my friends to tell her stuff. Then I liked her friend Lilly also stalked her. I was reported at school so many times. I also been telling her this kid likes you, and other stuff. I’ve been posting their pictures on my friend’s wall and stuff. After Christmas I got reported to the office about all that. A girl sent me a virus to my computer a bad one. Then one of her 2 friends was joking with me about being friends as well, and I liked 3 of them. I have been reported again about Lilly. I've been doing this for a while, and then I stopped doing this! Now they all hate me for this. I have autism; I didn't realize those things were creepy! I've also told her I also liked some of her favorite artist, I looked at her likes on facebook. I been very creepy around them, and acted cocky around her, and her friends didn't like that. This year they’re acting I little different now, because I’ve been leaving them alone for a while now, but a lot of people that know them. I also got in trouble with a girl this year, and she's also a cheerleader. I almost got arrested, but the principal gave me a warning. I just don't realize I creep girls out! I also don't notice face expressions, and body language. Gynea did like me back, but I stalked her by mistake because I didn't have the nerve to talk to her in person. After I've changed I'm scared to talk to girls now, because I'm to paranoid by thinking I'm going to creep them out. I'm also to scared to message a girl on facebook, because I keep thinking I'm going to get blocked or deleted. When those girls say hi to me, I feel shut down and too scared to say Hi back so I ignore. I think they really gave me a chance to be my friend, but I got paranoid. So I think they said they were joking to I can leave them alone and move on. When I like a girl I try to get their attention by cutting up and stuff. I don't have to nerve to talk to any girls. How can I change this?! Please help?