As Dan says, ( and he should know) This site is not really for that. You could develop relationships by giving advice on subjects pertaining to your business, but i see that as a byproduct.
Use LinkedIn and other social and business apps to reach out and engage customers.
I use Twitter for Customer Development as well. You'd be surprised how well Twitter can be for finding potential customers and you can reach out to them by a simple direct message.
I can share with anyone on how I use Twitter to connect with my target market.