My son is 5 and still sleep with us. My friends keep telling me that we have to make him sleep alone. But i am confused. What will b right age to get him to sleep alone.

There is no right age for you to transit your kid to sleep alone. As long as you and him are ready to do so, you can start the transition. My daugther co-sleep with us until she is 5 years old too. And now she will come to our room for 'staycation' over the weekend only and I find this is very sweet and help us to get close to each other.