Is it normal to regret the way your childhood happened?

Sometimes I think about back then and I wish my childhood would have been different..I'm still a teenager but I never had one of those best friend that you can rely on and that you always hang out with...I often look at the other boys and wish I was their friend..I don't know i'm not one of those nerds I just happen to be shy and it didnt turn out the way it should have..but now I have lot of regrets and I think it's sad how you realise how much being a child is great coming with its innocence and having no problems , friends and stuff like that..Actually I don't like how people change i've always tought innocence was the best option..people are becoming rude and so full of themselves, but also taking maturity which is good in some ways but like i've said I prefered being a child even tho I wish I had at least a friend I could rely on.Now that I look at the kids I envy them.