my lil boy has been driving me nuts the past fe...

my lil boy has been driving me nuts the past few days by not drinking his bottles. he didnt want his morning bottle got a bout70mls in him for his12 bottle then couldnt for the life of me get him to drink any of his 4pm one. and he will probly drink 120mls max for bedtime. he has been eating his 3meals a day altho only a few spoonfulls of dinner. becuz he is not getting enough during the day he has been waking around 3am for a bottle!! so should i decrease his solids meals to hope he drinks more milk or wat should i do??? im out of ideas haha