What does it mean when your crush reacts like this to receiving a gift?

So I have a crush on a guy at work and he says good morning to me every day at work, without fail.

Weve been talking since December and interactions have gradually intensified. This week was very full on.

I had a day off on Monday (which id mentioned to him twice previously, that I was going to be off)

On Tuesday morning, he came over to me and he seemed jittery. He told me about some personal issues about family and we had a long chat. Later on, I saw him in the corridor and I was wearing my lab coat. He looked me up and down several times. In the afternoon, we had another long chat and I complimented his aftershave, so he held his wrist up right in my face so that I could smell it.

Wednesday and most of Thursday, he seemed cooler in his interactions.

Thursday afternoon, he came over to chat and I gave him a packet of his favourite biscuits and some chocolate. His whole face went bright red and he couldn’t stop grinning. He said thank you several times and said how kind of me it was. He also kept staring at me, looking at my lips and moving closer.

why did he react like this?

What does it mean when your crush reacts like this to receiving a gift?
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