Sex with you on top

When we have sex i guess you could say im a little lazy :/ i hate to admit it but ive noticed for a while now that ive been slacking. i feel like im boring when i get on top i just go up and down just the basic and i feel like he gets bored when we first started having sex when we first got together i was always on top i loved it it was the only way i could orgasm but now i just dont do it i dont like it .. But when hes on top its amazing i loveee it, we do alot of crazy stuff in bed together for example we have anal sex maybe twice a week i never thought id do this in my life but i do eat his ass 🙈 im the one who insisted while we were drunk ( we showered) and he enjoyed it i guess so we do that every once in a while i just dont know what to do to spice things up while im on top .. Any tips or tricks lol ?!