The Universe is so big, it seems like there must be something else out there that is living. So, yes, but I also think that it is likely to be a very long way away – probably too far away for us to communicate with in the near future. The reason for thinking this is that, if life developed from some fairly simple chemical compounds, and the building blocks are common throughout the universe (as they are – we can detect them in/around distant stars), then it should be able to evolve again given similar planetary conditions.
Why haven’t we been contacted? Probably because we’re too far away from our neighbors.
I think that it is a bit depressing if there isn’t! I don’t think we will know for certain any time soon, but it is nice to hope. It is a very big universe out there Rowley – I think it would be pretty lonely if we were the only ones in it 🙂