Here is how I see it:
Life after death cannot be proved but then again, it cannot be disproved. I would argue that the only thing those who disbelieve in life after death have to go on is the fact that (to them) life after death seems too incredible to be true.
On the other hand, those who believe in life after death (such as myself) can have as a basis for their belief such things as the countless cases of Near Death Experience, After Death Communications and spirit contact through mediums to name just a few.
This is looking at the subject in a
matter of fact way. Even without these things to go on I would still believe in the afterlife because, to me, the afterlife and the continuation of the soul/spirit is as real and as natural as the here and now. Only the physical body dies - not the conciousness inside it.
Here is one of many interesting web sites on the subject.
Link.