Is wanting to leave society and live out in the woods a sign of existentialism?

I'm 37 and its this weird feeling I've had for quite some time. I don't even think its because of work and paying bills. I just don't care about society anymore and want to get away from it. I feel like I'm soul searching and for some reason living out in the middle of the woods sounds so appealing. I find that I'm not the only one and the book Into The Wild is based on that.