breastfeeding advice please

My daughter is about to turn 6 months. We've reached my goal as far as how long I wanted to breastfeed. I didn't think I could make it this long. But now it seems like she's more content with a bottle as far as getting full and being able to fall asleep. I've been doing it at night so she goes to sleep and stays asleep for a while.  Idk am alone here? What should I do? Up my supply? Or let her wean a little? I would like to go a year but idk ...