When are guys interested?

Anonymous
There's a guy I've had a "crush on" for over a year but am super shy about being the one to message him or talk to him in person. I work with his family and everyone wants us to try to get together and tease both of us about it. Those I work with say that everytime they mention it to him he blushes and get awkward and smiley... but he hasn't reached out yet either.
Is this a sign that he could be into me but shy, or that he's just embarrassed and isn't interested?
When are guys interested?
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