Why has this guy started ignoring me?

I’ve seen this random guy around a few times. When we’ve come into each others path, we’ve looked at each other and held the eye contact for a few seconds. He is always the first one to smile and I’m always the first one to look away.

I finally decided to take the next step and I said hello to him. We were walking towards each other and he smiled and stared at me. I said hello and his smile went even bigger and he looked down at the same time.

Since then, I think we smiled at each other once and we glance at each other from across the canteen.

However, I’ve found that when we’re in close proximity, he will look away from me and avoid eye contact. I’ve tried to say hi again but he will literally look away or straight ahead.

Why is he being like this after I’ve spoken to him?

Why has this guy started ignoring me?
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