Is he just trying to be my friend?

I was eating on my own and he asked if he can eat with me; we don’t know each other really well at all. We tried to get to know each other, but there were few awkward pauses.

We have also been waving/ smiling whenever we pass each other in hallways for the past 6 months. Is he trying to make friends or is he interested? I feel that if a guy was interested he would have made a move by now.

He is a year ahead of me in school and he already has many friends, I am not sure why would he want to be friends with me... do guys just befriend random girls?
Is he just trying to be my friend?
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