If you let anyone else assume anything about you, they will be wrong.
You are a complex person, with many facets. To truly understand you, someone would have to have lived every minute of your life, thought every one of your thoughts. Since no one can even come close to that, they have to guess at the gaps – and they will be wrong. Frequently.
So don’t let them assume. Coyness is not a virtue. Play your cards on the table, and be direct. Say who you are, what you want, what you can do. Tell your own story, because if people try to put you in a different one, it will be the wrong one.
Don’t blame people for being wrong. They can’t be otherwise unless you give them the answers.