It's heredity, man. Some have high foreheads which makes it seem like the hairline is receding. So take a look at mom, dad, grandparents and see what their hair / foreheads are like. That should help you determine which way this is going to go for you.
My hairline has always been like that but at 64, I still have a full head of thick hair. I wouldn't worry about it. You'll be fine.
Looks normal to me.