What should you do if you are a 16 year old boy and attracted to Dylan and Cole Sprouse?

Nothing, unless you meet either of them, which is pretty unlikely. Many teenage boys who are unsure of their sexuality have crushes on other boys or men, usually movie starts or pop stars so you aren't weird or anything. THis might be a passing phase and you may turn out to be straight. then again you might turn out to be gay or bisexual. For now, continue to lust in private over the Cole twins, it isn't harming anyone, and if you get really lucky you might have a threesome with the pair of them in some future wet dream.