Is this guy interested or am I tripping?

I work with this guy and I would like to know your opinion. Many times when I pass him an object he touches my hands even though he doesn’t have to. he stands really close to me when speaking to me, always laughs at my jokes, always pays attention at what I am saying. There was an occasion where his leg touched mine and it felt like it was on purpose as he didn’t move it. He is always playfully hitting me and asking me to do the same. But recently he turned and said to me that at work we are like family. But he never seems to treat anyone like he treats me? Is he hitting on me or am I going crazy?

Is this guy interested or am I tripping?
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