Is the awkward silence a bad thing with this girl?

So I haven't really hung out with this girl I only see her two days a week at college and she talks to me more than anyone in the class girls included and always sits by me. After class we walk with each other and talk but there always ends up being that awkward silence. I will try and spark up another conversation and she does comment but I don't if we just are both bad at conversing or of she not interested. She doesn't try and avoid me though or anything. Like that so I don't think I'm creeping her out.
Is the awkward silence a bad thing with this girl?
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