I disagree that it's because you breast fed for so long. I breastfed my daughter until she was 1 and my son until he was 10 months and that had nothing to do with them sleeping through the night by 9 months old.
I think it's more of a habit that he gets up and then habit to eat/suck to go back to sleep. Does he use a pacifier? How does he go to sleep when you put him down for the night? If you are rocking, singing, feeding him to sleep, that's how he is going to want to try to go back to sleep if he wakes up.
Have you tried a bedtime routine? Bath, book, prayers, bed? Then if he wakes up, give him a few minutes to put himself back to sleep. If he gets mad and starts crying, go in and comfort him, but no bottle. It's hard, but you need to find some method that works for you. My daugher was my bad sleeper...1st baby! I finally would go in and pat her, but not talk. If she was really upset, I'd rock her a bit and then put her back in the crib and pat her. If she kept getting up, I left the room. If she stayed laying down, I stayed in the room and patted her. It took a while, but she finally got it. I also tried to wait when she first woke up to make sure she even needed help to go back to sleep. After a while, she was doing good.
If you are worried that he's actually hungry, you can decide to give him 1 bottle at night for a while, but no more. Then you can make the bottle less and less, then just water, then nothing and see if that helps. Certainly talk to your peditrician to make sure he's growing fine and doesn't "need" the nurishment at night, but I suspect it's more of a comfort/habit thing.
Good luck! :)