It is definitelly worthwhile to be open , to talk to other people about this problem, to look for another university, to travel a bit, you can request a two month break to think about it; please also enjoy life and do not make the mistake of staying closed. Remeber that failure is necessary to then achieve success in what ever way with or wiothout a PhD.
Also, I have right now a similar, very similar situations. Let's see what life brings! life is wonderful!