Why don’t people ever make eye contact with me? It really bothers me?

I’m a 21 year old and ever since I was in 5th grade I’ve noticed that people can’t look me in the eye when I talk to them or when they talk to me. Like a person and I will be having a conversation and I’ll be talking and the other person will just stare at the floor or look around, but they will never look at me. The same thing happens when I’m with more people. Say a person is talking, they will look at everyone in the group except me. When I talk, literally the whole group will look away or stare at the floor. I used to think that this was because I’ve always been quiet and shy and I would barely say anything to anyone. However, I’ve tried to change this by getting more involved in conversations, yet people never look me in the eye when we talk. One time I also went to a job interview and the interviewer also couldn’t seem to look at me. She just kept looking at my resume and her own paper work. My coworkers also seemed to refuse to look at me. I ended up quitting after a year to focus in college. When I was in high school I straight up asked my friends why they never looked at me and once said that I was just “too ugly to look at” and another one said that I have a very intense stare that scared him. The most unique response I got was that my look is so pure that it made her feel bad. I don’t think these things are true but it does bother me that NOBODY seems to be able to look at me when I talk to them. It makes me feel invisible, as if I was some sort of freak outcast.