whenever i'm putting baby in our bed while sleeping he wakes up then i need to make him sleep again. what should i do?

Put some pillow between his legs or somewhere near his body as a substitute so he'll feel that you're still there. My baby sleeps the same. He sleeps longer when tucked in my arms or whenever I embrace him. When I'm doing something else, I use either his bolster pillow or this breastfeeding pillow :)