Have you have had a gut feeling that people are being nasty toward you but your not sure........?

totally, i think people at my work are like that but i don't have proof 100%. if I said anything my boss would just think I'm being stupid and paranoid, and that it means nothing for them to leave stuff on my desk, like an empty box of sweets with a sticker saying empty on it, or a book on belly dancing. (i'm overweight)