First you smile. If she smiles back that means you're good. Next i would say you probably want to find a common trend between your lives. And just because you eat lunch at the same time or sit at the table isnt a good enough reason. Ask her about music or tv. Dont expect a relationship just have fun. After some time has a let her know how you feel. If its meant to be you'll be with her ;) lastly have confidence in what you're doing. women love a guy who looks like he knows what hes doing