Its okay bro, you can be friends with anyone you want. tell your dad to suck it.

Wow only 2-4 years age difference? That's nothing. I'm guessing you met them in HS. Why does your dad expect you to have all the same age friends?

I think there is nothing wrong if you make friends with them. I have friends of various ages too and it isn't a problem at all.

That's not bad . You should decide who is and is not your friend based on their personality and how they treat you . I'm 19 and I have friends as young as 12 and as old as 78 . It really doesn't matter how old they are , just that they are good friends .