Yes Sam said "Shiva ko Sambhalna" twice to Sai. If he knows Virat will suffer his absence, why did he leave CN in the first place. ironically Virat had the best tme of his life, falling in love with Sai and all :)
And if jeeva knows Shiva is so attached to him, why did he not trust hiim in sruthi track. bakwas writing hain. but sill his last words about taking care of his shiva means something. They are desperately trying to connect it with virat's depression. upar se he lost the child and hope of being a parent.