Can u help?

I know im young im 15 and I have been takimg care if kids since I was like 8 well 9 anyway I want one of my own my boyfriend which is 18 and graduating this year said lets wait but I dont wamt to ... I talkes him into it and yea well now I started thinking about my dad... my dad would k-i-l-l kill me but if it weren't for him id do it and have one what should I do. .. im also mature enough Ive had plenty of practice plus I have the mentality of an adult everyone says that so what shoukd I do?