does he like me!?

We work together and he was doing all my jobs for me and kept asking me questions and standing near me and looking at me when i speak. He also wanted to wait for me after work so we could walk out together which we did. Today I saw him twice at the mall and the first time he waved to me and said hello etc and nothing more as he was waiting for someone. Second time was half an hour later and I was with a friend and I spotted him and he spotted me and he waved at me like a crazy person and put his hand in the air. And then came towards me and said hello etc again then had to go. Does he kinda like me? Apparently he's shy and im like bitch where?