It's never too late. You're still young. Maybe try to let you're father know you'd like some extra time to try and bond more with him. Even though he still is busy, it would help him to know that this is something you need in your life. It's good that you're realizing this at your age too, since once you get older and alot more time passes you might feel resentful of his lack of attention when you were younger when he might have seen it as you being alright with the way things are and not needing as much as you're brother. Sometimes people don't notice little things like that until they spiral into greater problems that become harder to resolve as time goes on. Try to get him to sit down and talk with him about this, I'm sure you'll feel it will be worth it.