Best friend.

WYR meet a new person who will become another best friend, or hang out with your current best friend?

Current

WYR get a soccer ball really hard to the face or to the inner thigh?

Inner thigh!

WYR fall out of a really high tree and land on your back or your legs? (OUCH!)

No kidding, ouch. Legs.

WYR learn to skateboard or trick-bike?

Skateboard!

WYR watch Captain America 1 or 2?

I'll go with 1 since 2 wouldn't make any sense otherwise.

WYR listen to an amazing song on loop for an hour or listen to an hour's worth of okayish songs?

Hour's worth of ok song's since that's what I do every day!

WYR be able to cook really well or have an cook who can cook Ok?

Be able to cook really well (although I don't like cooking much...but I like baking!)

WYR use one long sword or two short ones? (Something makes me think I already asked that question...)

EAT?!?! Well two short ones!
Ok no eating? Well then one long one!

WYR have to do a math test without a calculator or have to be in a spelling bee without practice?

(Ack! *goes and fixes post*)

Spelling bee.

WYR swim in a lake or hike in woods without a path?

Swim in a lake. More into swimming than hiking. And I've swum in a lake multiple times. 🙂

WYR find out that your best friend is now your brainwashed enemy or is a ridiculously good liar? (No... I don't have Cap 2 on the mind at all... 🙄 )

brainwashed enemy. (Yes, It is fine to say I am REALLY weird!)

WYR not be aloud to eat for a day or be forced to eat all day for two day's nonstop? (so you get full, and get a cramp)

*wince* Not eat? I mean, I'd hate to do either, but one day is shorter than two.

WYR be in a romantic musical or a comedy?

comedy. Done the musical. Hated it. End of subject!

WYR dress as Larry Boy for Halloween or Archibald?

Larry Boy, totally!

WYR learn about spontaneous human combustion (which will give you nightmares, trust me) or meet a giantic spider in a dark tunnel?