Most Helpful Guy
Tell him you're unhappy and need more from him then see if it improves. I think it might improve but only for awhile then he'll be back to what he was
Most Helpful Girl
If you've already told him you're unhappy and want it to change and he still hasn't, I'd honestly take some time apart from him. If you're feeling unwanted this is the time you're most likely to cheat on him with someone else.
Give him time to miss you without you being there all the time. Play games and don't honestly pay him any attention, he'll soon wonder what's wrong if he cares.