Why he does this?

I use to talk to this guy and he said that he likes me a lot, he even told his friends that he’s in love with me.
The other day he said to me, “if we went to a date with you, what would you wear?” and I told him that I’d wear a red tight dress or a black one. And then he asked me if I had a picture of me with a dress like that, and if I did I should send him the picture.
And minutes before he said that he wanted to hear my voice, by audios. And yesterday he talked to me and asked me “what would you do if I kiss your neck?” and later “I bet your hands are so beautiful”. I showed him a picture of my hands and he screenshot it.
What does it means?
Why he does this?
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