He gave me his necklace?

I met this guy about a week ago and today we went on our first date. At the end of the date he said he really liked me and we kissed and he said he felt really close to me...then he took off his necklace he said he's not taken it off in 5 years and he gave it to me...and he said its so I can look at it and be reminded of him. I'm just really worried because a friend of mine thinks this is something players do to get a girl to sleep with them, but I want a relationship and I think I'm falling in love with him, I don't want to get my heart broken.
He gave me his necklace?
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