Yeah I get suspicious looks too. People trying to figure me out and they seem creeped out or fearful. Definitely not imagining things. People at stores side eye me a lot and sometimes when I get to the register the cashiers aren't friendly, like no 'hello' or 'thanks' usually they don't look at me straight. Also got this reaction a ton in high school and in my 20s when trying to talk to girls:
At one party the girls were talking how much of a creep I looked and they left, so I have literally ruined a party by just existing.