Make toddler wean?

Ds is 17m and still breastfeeding. He's getting super-squirmy & hard to feed (even though he wants to) plus now that he's talking a lot he wakes up overnight sometimes crying & yelling 'mama, milka' repeatedly until I feed him ? he has mostly slept through since a few months old with some bad stages, but the current stage of night waking for milk is driving me crazy (& he's tired etc too).