Can somebody please help me with this factorization question:

Factorise fully 3x^{3}y - 3x^{2}y + 6xy - y + (xy)/2 - (x^{2}y)/2

I tried this question and this is what I have done:

= 3xy (x^{2}- x + 2) - y (1 + x/2 -x^{2}/2)

Can't go beyond this .... please help. TIA