6 month old not sleeping. HELP ME.

My 6 month old son is breastfed, co sleeps and doesn't sleep but an hour tops at night.

He can sleep THREE HOURS for a nap during the day in his crib and then at night, he's up every hour.

Has anyone successfully breastfed and had a baby sleep throughout the night? Any book recommendations or personal recommendations?

I loved Co-sleeping until it started hurting my sleep and me and my SO's relationship.

I know every baby is different, just would like some thoughtful opinions.