Earlier quoted context omitted.
You're a Spanish citizen, as there is no such thing as per-city citizenship in Spain. BTW, you can twist the words at your convenience, if that makes you happy.
Currently, I am technically a Spanish citizen. I like people from Spain, their food and their culture, and I even find it kind of cool that they have a king, although I do not feel he is my king in any way. When I watch a soccer game with the Spain's national team I can equally celebrate a goal scored by them or against them if I like the goal. With Catalonia's national team (who only are allowed to play once a year)…
Regarding the "Catalan people", I am "Catalan people", too, and the only oppression I see in the Catalan region is the one pushed by the Catalan regional government towards forcing uniform ethnic brainwash from public administration and schools, in Catalan-only, instead of bilingual Spanish-Catalan. A reminder: not only Catalan-speakers -mother tongue- (35% of inhabitants of the Catalan region) have rights, Spanish-speakers (55% of inhabitants of the Catalan region) have rights, too. So next time you fight for your rights, be sure you're really fighting for your rights (I would endorse you), and not for quitting/removing/stealing other people's rights (I would not endorse you). Respect works both ways.
Kind regards.