Could you please help me interpret this guy’s behaviour?

The following situation happened: Coincidentally we walked towards each other in the corridor. It’s a top secret (shh) that I have a massive crush on him so when I noticed him I looked in his way. When he saw me we looked at each other for few seconds with a neutral face, but if I remember well his expression was kinda attentive. Then after less than half an hour we met again but I had a company (one of my colleagues) and when we walked past him he looked only at me, my face.

Are these signs of something attraction/flirt/interest or anything else? I’m really into that guy but I’m lack of confidence to approach him so it’s easier to suffer with a constant thought of ‘what if’ than make a move. :):)

Updates
5 mo
Okay, thanks guys! I’m afraid I misunderstood his behaviour since I’m into him. Also I don’t know how to make the first move. It’s really frustrates me that I know his intentions (even if he has any) and I don’t know him so I don’t have any info how he behaves with others. I am so disappointed because I don’t know how to get in touch with him. I was wondering to add him on social media but isn’t strange when a stranger just appears on your profile out of the blue?
Could you please help me interpret this guy’s behaviour?
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