Is it normal that when i talk to people i try not to make the upset?

When I talk to people and they ask me a question, I'd say pretty much anything in order to avoid confrontation. I don't want to say things to people that would hurt their feelings or make them mad, but in doing so I end up making myself look odd because I take so long replying to them because I'm trying to find a response that won't offend them.

For the most part, I am pretty blunt with people, but there are certain situations, mostly when I'm talking to friends and relatives, where I try my hardest not to offend them because I don't want to make them angry and yell at me or something.

For example, someone may ask If a dress makes them look fat and it does make them look fat, but I know saying that would hurt there feelings, so I stand there for like 5 minutes trying to come up with a reasonable answer that won't offend them. Usually, I come to the conclusion that no matter what I say it will be taken the wrong way, so I end up just saying I don't know to most questions.