I'm a masochist and people mistook me as a Dom

Can someone explain why I like being hurt
Cause like my personality is 100% different from my fantasies so people always mistook me as a Dom but I'm the fucking opposite
It's hard to explain it to people (cause I'm shy about this topic ) so I have to go with flow and always get bored with the person I'm talking with cause they be acting like a sub and I'm not into that :')
I suffer.