I'm done!

I've breastfed for 6 months and my little one does not sleep. I've been up for the last 2 hours with him and I just can't take it any more. He wakes 4, 5, 6 times through the night. For my sanity I'm switching to formula and letting his dad deal with him from now on. I'm just done with this now. I wanted to breastfeed for 1 year but I think my mental health and sleep is more important to me now as I have another child to take care of. I just need to vent because I don't know what else to do!!