I work near a shopping mall, and I go there everyday to buy lunch. There's a men hair salon just next to the restaurant where I get my lunch from. Yesterday, the salon added me on Instagram and one of the guys working there started messaging me. He told me that he sees me everyday and wanted to talk to me for months but he didn't have the courage. The thing is that I never talked to anyone there, so I don't understand how he knows my name and how he found me on Instagram. He even said that he followed me once to see where I work. I'm really creeped out and I don't know what to do?