Brief Answer:
To some extent this is normal.

Detailed Answer:
Hi thanks for asking from HCM

I can understand your concern. Anger, jealousy, low mood etc are normal human behaviours. In day to day things sometimes we become jealous with even our close friend due to any small thing. Right now your friend purchased outfit like yours and you are getting angry unconsciously because it's our normal tendency to keep our personal things (outfit in your case) unique. This anger is turned inwards and resulting in depressive mood.

So just try to remain relaxed, instead of getting depressed and angry think of positive things. Try to find good things and positive things in your friend. When you will think about such things the anger will decrease. So remain relaxed and no need to worry.

Thanks, Take care.

---