My parents are very strict and its affecting me terribly

I read the post about the girl who posted about strict parents. I can relate to her. This is the first time I've ever posted about this and I can't post it without crying. I lost my mum when I was really young and since then my dad stopped us ( my siblings and I ) from going anywhere besides school. He's very wealthy but believes that the only thing his children need to have is food to eat and a bed to sleep. Is it possible that a girl won't have needs like soap to bathe or just a normal body cream, deodorant? Haba. We are also not allowed to go out and have friends over. Sometimes it sounds unreal that this is my life, I've lost almost all my friends because how do I explain it to them that I can't go out at my age? Even to the gate of the house. They also don't invite me anywhere cos they feel I won't come. I know it's his money not ours but we the children never asked to be born in the first place so why treat us badly? All the cleaners, maids and gateman have been fired and we now do their jobs. I don't even mind doing it, it's just the insult that comes with it. We are lazy and ungrateful. I don't know how I wake up every day, how am I still living. I've contemplated suicide many times but I feel it's too selfish of me to leave my siblings behind. I definitely can't keep a relationship because I won't be able to see whoever I'm dating. My step mother even had the audacity to ask me to bring a man home for marriage. From where pls? When I don't go out or nothing, I'm extremely beautiful, light skinned and I speak very well so if anyone even sees me, they will never know that I'm going through all of this. I'm optimistic that one day, my life will change. I just wanted to share my feelings with everyone.