i think he is definitely latching on to you as a means of comfort. even though he is not really hungry, he wants to keep suckling as it gives him a sense of security. rest assured, this is pretty normal, and with a little patience and tricks you will be able to help your baby out of this habit.
at this age your baby is going through a lot of development, hence is also waking up multiple times at night. i would suggest get your baby a sleep toy, which is like a type of soft toy like a small blanket that your baby can hold on to tightly while sleeping. it will help your baby get comfort and also help to come out of the suckling habit. you can find them easily on online stores such as amazon.
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