Neha WHO recommends atleast 2 yrs of Breastfeeding, because after 1 year baby ho through lot of growth spurts, teething, illness, food strike etc and breastfeeding will be the saviour. However if you wish to wean then do it gently. Check Jay Gordon's method of weaning, you can simply Google it.

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It's difficult to wean off the breast...try to offer him a wholesome diet in dinner like daal chawal with veggies, daliya, roti dipped in daal or sabzi..also take support from spouse or family members as to when baby wakes at night and asks for feed they can swaddle the baby to sleep again..it takes time