Girls I don't know how to stop my son from breastfeeding during the da…

Girls I don't know how to stop my son from breastfeeding during the day, it's okay if he gets tired during the day and just falls asleep on his arms but at night if I don't give him himself climbs out of his shirt pulls it up asks for it, at night he may not even eat but just asks to be near or scratches already so tired ? all night I don't sleep, my whole body hurts