Coincidence? I'm not sure...?

One of my friends is really loud and not only does it attract unwanted attention, but I think it’s driving away my crush because he only talks to me when she’s not around. For example, last week, she was out of town, and he talked to me for the first time since our awkward Valentine’s Day. And then today, he wished me good luck on my exam and he even talked to me afterwards, which is strange since he usually only talks to me once a day. In all the scenarios, she isn't present. Do you think it's just a coincidence or is she cock-blocking with her loudness?