Is my boyfriend's reason for dumping me dumb (brutally honest answers)?

I'm a very nice, polite and sweet girl and I don't get mad much and much agree with a lot of things to people. Some guys think I'm "creepy" for being way too nice and polite. My boyfriend who I was dating for only 2 months dumped me because I wouldn't be "honest with him. He got irritated and fed up when I agree with him with mostly EVERYTHING. Like when we go on dates I usually let him pick and I agree. He said I should choose for once and I don't have to like everything he does. He also got annoyed when I agreed with him with everything. He was like, "STOP AGREEING WITH ME! For once would you DISAGREE with me?!" 
I told him that I wanna make him happy and it is polite to not make someone mad thank you. And he got so annoyed with me. I always compliment him a couple of times a day, I smile all the time and all that. He told me to not agree with him to make him happy and get got after me for sugarcoating the truth about something (It's personal) and he earned me if it happens again, we're over and we've had arguments about it. I told him politely, "It isn't polite to yell and we should be calm and happy. I told him to use proper manners and he just got very irritated with me. I also tend to let people run over me but I isn't wanna make them angry. My friends are very annoyed that I'm overly nice and polite. I always say, "Thank you for having this talk with me. I am delighted that we did." My boyfriend dumped me yesterday because I tend to agree and sugarcoat stuff.