Guys, What his gesture mean friendly or interested?

How should I interpret a situation where I was talking to a colleague, and I noticed Sanjay looking at me? When I asked him why, he handed me a bottle and asked me to open the cap. I jokingly asked what I would get in return, and he promised me chocolate. After I opened the cap, he asked another colleague to bring me the biggest chocolate, but I said I wanted a toffee instead. When the toffees were almost finished, with only one left, he gave me his share of the toffee. What could this gesture mean?

Guys, What his gesture mean friendly or interested?
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