As its your friends Haldi you just can’t walk off in any outfit from your wardrobe, you have to prepare for it. Try to keep it low key so that you don’t dress up like a groom but not that less attractive that you don’t even look like you attending an important wedding function. Go for yellow or white Kurta with Denim or Pajama, pair up Nehru Jackets with white Shirt, Style your Pathani in contrasting colours and embroidery.