I've always attracted some gloomy and eccentric boys. Why is this happening? What's wrong with me?

"Recently, I've been getting more and more confused about this matter. The people who like me are the type that I don't like. They're especially gloomy. For example, there's one who's just a friend of mine. He's a very casual and ordinary friend. I never take the initiative to contact him. He's the one who always contacts me to say hello to each other and talk about work. He says that he likes me. I reject him, but he still doesn't give up. He insists on coming to my city to see me and says that he wants to stay for me. I don't see him, so he keeps pestering me." He even told me that he had been diagnosed with autism for three years and that he hid in his room, not even meeting his parents. He said that he had already mustered up his courage to confess to me. I couldn't say too much about such a person, so I could only change my phone number and completely cut off contact with him. There were also a few autistic people who liked me, but why? Recently, there's another very strange person who keeps pestering me. I didn't give him any chance at all. My attitude towards him isn't good either. Because we're colleagues, I can't see him often. He wants to chat with me online, but I don't reply. He still keeps chatting with me. How annoying! There was also a male colleague who asked me out for a meal. I rejected him. The second time, I rejected him again. He cried. I was so sweaty at that time. He said that he liked me very much. But she couldn't cry either. If it was just one or two, then forget it. Most of the people who like me have this kind of personality. How could this be? There must be something wrong with me. Unfortunately, I can't see my own problem. I used to be quite introverted, but I haven't been introverted for a few years now. However, I'm not a very lively person. I'm a tactful person who doesn't offend people. I have a lot of friends. I give people the impression that I'm quiet, gentle, and considerate. Is it because I'm too tactful, so maybe no one pays attention to them usually? I'll talk to them politely. Maybe that's why? What should I do? I don't want to be like this anymore! I want to change. I want the people I like to like me. The people I like will say that you are really good, very outstanding, and a good girl, but they will still like others. I feel like this is ironic. If they directly say what they don't like about me, I will know it, right? What should I change now???? I'm like a headless fly. I don't know what's wrong with me. I'm confused. Who can help me?