Do you go through phases where you just don't want to talk to anyone?

I have these weird moments when I just don't want to communicate with anyone so I won't charge my phone, I won't go on social media I just shut myself away. I don't know why I do this and I can't explain it to anyone. I tell myself that I need to talk to my friends and see what's going on, but I just end up putting it off till tomorrow and then before you know it a week has gone by or two weeks. One of my close friends thinks that it's personal and I've tried to explain it to her that it isn't but now she is upset with me because I haven't be around and she has stuff going on. I'm not sure what to do about it or how I can resolve it when I don't know what the actual problem is. Do you have any advice?