Dating

Why didn't he say hi to me?

Apparently, I'm texting this guy, we have never hanged out with each other and we only saw each other once he waved at me but I didn't regconise him. So yesterday, I was sitting at the food court with two other friends and I saw him sit right in front of me with his other two friends, I've waited for him to come and say hello but he didn't, I thought its because I have friends with me so he feels nervous so then I tell my friends to go and buy something, and I sat alone there but he still didn't come up and say hello to me, I looked at him and I know he knew that I was right in front of him. His friends were full of looking at me too. When I went home, I texted him:" You didn't say hello :(" - Him:"Ohh so it was you who sat in front of me! :O you didn't say hi!" - Me:"Ur the guy, you shouldve said hi" - HIm:"Nup..You saw me so you shouldve! == I didn't actually pay attention :L" - Me:" I guess we both know what to do next time" - Him:" ha ha yeah (Y)...Why he didn't say hi to me? I'm sure that he did see me, was it becaue he lost interest? Should I say hi to him first next time when I see him?
Why didn't he say hi to me?
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