What does it mean when a girl starts calling you by your real name more often?

paul03
This girl gave me a cute nickname before and she was using it most of the time instead of my actual name (sometimes she would use a short form of it too though). Lately I've noticed she has also started calling me by my full first name a lot (not the short form), which she never did before. So now she basically calls me in 3 different ways.

I have also noticed that now she says my name more frequently in our convos even when it's kind of unnecessary since she knows who she's talking to.

Can anyone tell me what's going on?
What does it mean when a girl starts calling you by your real name more often?
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