So open yourself up and collaborate. Don't close yourself off out of fear of competition or losing customers or 'giving something away'.
Work with influencers, local businesses, other boutiques, and shopping centers and open up your market. There's plenty of business to go around.
You will find your new customers in other people's markets, and vice versa. The energy you put off by being fearful of working together is a low vibration and everyone feels that, from customers to businesses.
Open up. Give. Serve. And you shall receive.