Why did my ex boyfriend touch me like he used to?

He was drunk and he purposefully came up to my floor...he never hung out up there with the people on my floor before. At first he was flirting hard core with all the girls that were around. He Tried to like poke me earlier I guess but I turned away to talk to this guy so he missed and then he just stared at me for a while. Then later he walked by and squeezed my side all gently like he used to. Then he came back and tried to join the conversation I was having with my friend. He broke up with me about 2 months ago. Was he just playing me because he was drunk?
Why did my ex boyfriend touch me like he used to?
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