my 1 year old has been up for almost an hour and its almost 1:30a.m , he doesnt want to sleep unless…

my 1 year old has been up for almost an hour and its almost 1:30a.m , he doesnt want to sleep unless im holdibg him. if i notice that hes asleep then i put him in his crib but as soon as i do he wakes up...ugh 😧 the night my hubby isnt home is when this happens, i would co sleep with him but i have hard time sleeping kuz im constantly in pain, so i cant ever get comfy, anyways, any clue why he would be acting like this? ???