Frenemies

If, as the saying goes, you should keep your friends close and your enemies closer, where should you keep "frenemies"?

If you look at just the term "frenemy", it would make sense to keep them closer than your friends but not quite as close as your enemy, since it is kind of and in-between term.

However, if you examine the concept of a frenemy, it might be more appropriate to keep them even closer than your enemies because their thinly-veiled malice towards you could become a liability. So you would want to watch them even closer because, with an out-right enemy, you know they are going to try to harm your personage or character when ever they have a chance. But with a frenemy, they could maintain a facade of kindness and friendliness for many years until you least expect it, and then they release their full fury when your guard is down.