Does he like me or is he just being nice?

I noticed that he steals glances at me when we are in a crowded room but when we talk he looks deep into my eyes like he stares into my soul. When we meet in the hallway he says hi in a sweet soft voice. He touched my hand a few times before but last time I handed him a book he held my hand and we didn't move for a good amount of time. Last week I called him on the phone and when I said hi! It's me he softened his voice and I heard that he's smiling.

Does he like me or is he just being nice?
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