I don't want to be here any more but I don't know how to tell him

Him being my dad, I am 16 and live with my mom most of the time but I'm with my dad every other weekend. I love my dad and love the time we spend together when we spend time together that is. My brother has lived with us because he just plainly can't afford to live on his own. His kids are here every other weekend too. His son is living here mostly full time now. My dads re married and she said 3 daughters. Two of her daughters have kids and one is married. Well their house caught on fire. So now there's 16 people living here at one time. I don't feel that is this fair to anyone involved. I have no space. My bedroom which I was already sharing is now also playroom for the kids. And they come in super early and wake me up. Not only that but the kids ruin my things and no one cares, my step mom even asked why I was making it such a big deal. I can't do this anymore. There is a lot more than what I put in this but it's too much to type. Not only are there 16 people here but my dad's company is run out of our house. We don't have a living room or dinning room it's all for his company. I want to see my dad I do but I also want a bed that is mine when I'm here and when I'm not. I have no space here and I'm just done. I don't know how to talk to my dad about this because I know it will hurt him. Thank you.