I bought a dress and was laughed at.

You don't have to be angry, you should feel lucky, because he is jealous of you, so he will say such a thing. Generally speaking, such people sometimes feel inferior in their hearts, feel that some places are inferior to others, and they can't overwhelm others if they want to, so they satisfy themselves by belittling sarcasm and even irony. Besides, it seems that you are usually an easy-going person. Next time, just try to go back, and he will talk about you later.