I'm ashamed to say that I am a Mexican-American.?

I grew up in New Mexico, it became an official U.S. in 1912, and I have ancestors from there, so technically I guess I would be umed as Mexican, even though I've grown up there my whole life. My parents aren't Mexicans, neither were my great grand parents. I don't know a whole lot about my history due to the fact that my parents wanted to abandon their "Mexican" roots, I grew up eating American food, I never engaged in the Latino culture at all. When people ask me what I am, I say I'm from some other Latin American place, like Colombia, Chile, Costa Rica, Ecuador, etc... I'm afraid that they will think I'm a low-life and ugly, because I hear people putting down Mexicans all the time. I don't fit the Mexican stereotype. I'm educated, a U.S. citizen, I don't talk loud in public, in fact I am a reserved person, and I can't even speak Spanish. Do you think I should be true to myself and claim my Mexican heritage?