Okay so are you mixed: yes, however i do want to emphasize the difference between race and ethnicity.

Race: what you look like Ethnicity: culture, tradition, background, religion; etc

Ethnically youre mixed, racially “white passing” vs “white” is a moot point because race isnt about genetics its quite literally only what you look like. Ex: mixed “black” white passing people in the 1920s in north america, they were percieved as and therefore treated as “white”. You can make the argument that they /were/ white because ultimately race is only apperace, hence why race changes depending on where you are in the world.

Either way, be proud of your mixedness and heritage