Just keep doing what you're doing. What you're describing is totally normal. Actually, I'm not sure we were even managing 2 hours between feeds at night at 2 weeks. It was often more like 1.5 hours some times. They have tiny tummies and it's normal to feed more during the night in the early weeks. If you were BF, they would do this to boost your milk supply for the coming growth spurts. Even if you're bottlefeeding they still do the same. Also, you're probably with her more during the day (holding, cuddling, etc.), but during the night if you're sleeping separately, she will definitely wake and want a feed more for the comfort of being close to you. It's very soothing and reassuring for them. Just keep doing what you're doing. The nights do get easier. My daughter went a few whole nights without a feed by around 8-10 weeks, though she still mostly had a night feed (or 2) until 9 months.