You are perfectly normal.
If you're uncomfortable, there are ways of fielding questions and comments so that you close the conversation quickly and turn it to work matters.
A compliment given = "Thank you." No more. No less.
A question such as "Have you lost weight?" = "A little. Thank you."
"How much have you lost?" = "Enough." And a smile.
"How'd you do it?" = "Hard work." And another smile.
And that last answer usually ends the conversation.
You can also quickly give an answer and change the subject.
"Thank you. Can you believe those reports are due tomorrow? Oh, boy... so much work to do before then!"