sadie, perhaps what you are feeling is actually compassion--which I can certainly understand! Some of us who are naturally empathetic and lean easily toward compassion also tend to feel guilty if we don't or CAN'T help out. In this case it is sooo difficult because the help has to come from himself.
It seems to me that you are looking at this situation in a very realistic way---even though you are sad. You will, undoubtedly grieve the loss of the relationship, as we do when we loose anything we have put our heart into.
We will be here to support you at any time!!
dandylion