Do Thai people really hate Myanmar folks?

I'm a Burmese national trying to finish his bachelors in Bangkok. Just got here and quite liking it apart from an advice my friend gave about Thai people. He said they hate Myanmar because they think it's inferior and war ridden. Whenever Thai people ask where he's from, he has to lie that he's from Singapore & his English is decent enough to fool them. (He worries that their manner of conduct would change if he said the truth.) My question is, is it true that Thai people hate Myanmar people, or is my friend freaking out for no reason?