A friend of mine did that and since he had to walk the dog, met many other people with dogs and in so doing met a lovely girl and they're now happily together with both dogs.
Having someone/something to care for and who depends on you is sometimes a substantial boost to one's psyche.
The traveling thing - it's funny you should mention that. A month ago I did exactly this. I've left my business running and I've gone to another country. I am trying to spend as much time as possible volunteering, to help other people, as I thought this might help me. So far unfortunately I have felt very bad here. I am not entirely sure why. I will be here for another 2 months before I return.
You may find it brings a new desire to live when you actually have to work to stay comfortable. There are many options, off the top of my head I would say fly to India with very little money and try to make a living. You have your savings as backup but try not to use them unless you really have to.
I realise it doesn't apply to everyone, so perhaps this isn't the answer, but at least for me excitement is what keeps me going, without it life really is quite boring.