Fairyamma... I really feel for you. This happened to me too, my grandson was super cuddley towards me then all of a sudden he blanked, it was just his way of showing his new learned independence, although rather childishly I found it more amusing that upsetting. Also could his parents have said something to put him off you in some way.? As this also could also be a valid reason especially if there is some jealousy in the amount of love he showed for you. This happened with my granddaughter by the way. So don't be put off showing your grandson effection. Soon he'll be too old for cuddles, or it won't look cool in front of his friends, as I'm often reminded by my 10 year old grandson. Whatever the reason, its not your fault, just go with the flow or it will become an uncomfortable issue and give rise to conflict by all involved in your grandsons life. How can cuddles ever be wrong from a loving grandparent.