My best friend and I text and talk all the time, but there are some instances when I'll call and I won't hear from her for days. Every time I call, it rings the normal 5/6 times and then goes to voicemail. Sometimes it will just ring 2 or 3 times, or even just go straight to voicemail. When I ask her about it, she tells me that she never got the calls. Is there a way to tell if she's ignoring my phone calls when I call her?

Nope... you are going to have to trust her.

But its not a malfunction... if her phone has a weak connection where she's at... it might go straight to voice mail... happens to me... get a notification of voice mail when the phone never rang... but it happens in an area I know the signal is very weak.

On the other hand, maybe she's ignoring you for some reason and just doesn't feel like being bothered by you.

My wife's cousin is always texting and calling me... and it always seems to be when I'm doing something and can't be bothered... so I just don't answer and get back to him when I feel like wasting 3 hours.