<human>: Hi everyone.

I've been with my girlfriend for just over 5 months now. Over the past maybe two months she has occasionally gone days without talking to me, but then once we get back into communication or hang out again, she is perfectly normal. But this time it is not just "not talking to me" but actually avoiding me. By this I mean if I try and call her, or send her a message, or anything, it will go unnoticed, whilst she continues to communicate normally with everyone else.

We both aim to live relatively independent lives, however, when she does this, it is out of the ordinary. Normally, we will at least have some sort of brief communication each day, whether it be a snap chat, text message, or even just tagging each other in something on facebook as a minimum.

At the moment, its going onto two days in which I have failed to get a response from her. Now, I'm not continuously trying to call her or messaging her asking whats going on. She has one missed call, one text, and a few facebook notifications which have simply been ignored. I even put a birthday invitation out on facebook in which she is now one of the last people to say they are attending, even though I've noticed her responding to other things on facebook. 

I'm always willing to giver her as much space as she needs, but is this actually normal?

I don't want to send her a message saying "whats going on, you've been avoiding me, what have I done?" as what if there isn't anything wrong at all and I just come across as clingy and weak?

I usually just wait for her to respond to me, but I've got no doubt this this could go on for another day or two. 

I just don't think its fair on me.

What should I do?

Can you condense the text into a few key points?
<bot>: Girlfriend has gone a couple days avoiding me, I've got no idea what is going on, and I don't know what to do about it.