My baby is 10 weeks now and he is still waking up every two hours or lesser for milk ( shorter in the day time ) . He drinks about 80- 100 ml each time . Is it too much ? How can I lengthen the feeding time and let him sleep more esp at night ?

At 10 months your baby needs to be fed as per demand. i know it makes it difficult for you to rest or sleep, but for the first few months, let him feed at his pace, as it will help him get the best amount of nutrition. both my kids also woke up at similar intervals for the first almost 4 to 5 months, and it felt they would never get a regular sleeping routine. but gradually your baby will start taking more time in between feeds. please avoid giving pacifiers and feed instead.