If he really loved you then it wouldn't matter how "stressful" relationships are cause you'd be worth it. Statements like that are usually followed with a claus usually sexually related. Even if it's not it just kind of seems like he doesn't want to bother having a relationship with you but doesn't want you to get over him.
I really wouldn't follow the girls advice above me because nothing screams desprate and pathetic like dressing like a tramp and being all over him. No offense.
If I was you I'd give him some space. Do your own thing. Stay away from him. Few things are more irresistable to a boy than inatainablity. Thrill of the chase. And who knows whilst you are away from him you might find someone better who can be bothered having a real relationship.
Good luck :) x
Wear sexy clothes and b flirty also do you no the ten tips to flirting??What else can me and my boyfriend do?