A frienemy is friend that you love but at times you call an enemy for joking purposes. They is sometimes there for you unlike a best friend
who is always there for you. They may tease you and do stuff to you in front of people for fun, which you may consider mean, but on the inside but your frienemy willing to almost always be there for you. Peace!
Friend: "Hey my best frienemy!"
Frienemy: "Wassup retard, looking fugly
Friend: "Thanks man!"