let your baby to play more so that he will can tired so that will sleep better. Apply the drink-activity-sleep technique to see if will help. Sometimes the more my LO wants attention and refuse to sleep,I will just ignore and let her fuss then soon she will sleep.But of course every baby is different.I know how it feels like when your baby doesn't want to sleep when u are sleep deprived. Hang on there!
My girl start shows separation anxiety at around 7+months. She needs me by her side to sleep, as much as possible I will put her into her bed to sleep. She wake up so frequently midnight that many times I gave up and let her sleep beside me. Now she is 8 months.
totally normal. this phase shall pass.