Life...?

Does anybody else think it's weird how life and you can change? How quick our futures are coming? How soon we could be living on our own without a parent or family member just down the road or be married to the 'man/woman of your dreams' and have 1, 2 maybe more kids? I don't know why but it makes me really emotional just thinking of the future and the past. In my life I've only ever had one dream which is to be a successful singer. I'm 15 and I still haven't given up on this unlikely outcome. However every now and again I have these thoughts where I just think, 'what if I never find someone? My perfect partner?' or 'What if I don't get married like I hope to?' 'What if I even die young?' or 'If I never get to where I want to be in my life to be?' It's so weird. I think back to when I was little and ask myself if my younger self could see me now... would I be proud of what I've done? Would I accept my goals in life and what mistakes I've made? What If I'm heading nowhere? It's scary... Life is scary.