Chewed out by boyfriend's dad.

I am white and my boyfriend is Mexican. I've been dating my boy for almost two years now and I still haven't worked up the courage to talk to his parents. They don't speak English and I don't speak Spanish. It makes it really hard for me. Unless my boy is in the room with me, I stand there awkwardly because I'm so terrified. They find me disrespectful because I never say hi or ask them how are they. And it's not like I do it purpose. I would never disrespect them on purpose. I don't expect them to understand when I don't understand it myself. I don't know. Anxiety? Is that what you would call it? I'm terrified to the point that I can't get words to come out of my mouth. My heart beat a mile a minute and I want to run out because I might start crying. I'm the shyest person you're going to meet. I just can't do it. No one understands. Maybe it's because I can't understand what they say or I know that they have high expectations that I can't reach. I don't know what to do. I know it's apart of their culture and such. It's important to them. They'd rather him be with a Mexican woman instead of a white girl. My boys brother's ex girlfriend is a huge reason why they don't like white girls. Anyone know how I feel or is going through something similar?