If a guy doesn't get jealous when you're with another guy does he not like you?

So if you like a girl and you're ok with her spending time with a guy who's attracted to her do you not like the girl?

This is basically after the girl has kind of let you know she likes you and doesn't prefer anyone else and you have also shown several signs of interest.

Updates
+1 y
Forgot to add she had made it absolutely clear she's not interested in the other guy on his face lol when you were also there
If a guy doesn't get jealous when you're with another guy does he not like you?
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