What other people think about my clothes

I am always worried about what other people think about my clothing/makeup choices and it is crippling and useless. For example, I bought a summer outfit that I love but it is more feminine than my usual t-shirt and jeans that I hide behind. While I love the new outfit, my mind goes WILD with thoughts about how some person (specific people come to mind) is going to comment or laugh at me or not like it.

What is an example of a model I can work on for this? I so badly want to dress and present myself in a mature way (feel stuck in my college years) and dress in feminine clothing.

Thank you SCS for helping me realize that it is something I can control and change!!!