So, what kind of 'usage' are we talking about?
I think 'easily bored' is an EP trait. Especially if you are Ne dom.
However, my *friends* don't bore me (I define "friend" more strictly than the popular definition of 'friend', so I don't have a lot of friends). I think if someone I considered to be a friend said, "you bore me" my response would be "who the $#@$ ever said I was supposed to entertain you???? am i your @#$#@$ toy??? how @#$#@$#@ old are you???" and some other choice words (I'm not sure exactly how to pronounce '@#$#@$@#$' but you get the idea)
Maybe this is a question of semantics? Don't think so though.
Anywhoo, I think EPs are generally flex. I assume people have balanced lives with varied interests. They have stuff going on. I expect and encourage them to meet new people and make new friends and try new things. And there is a flow to people's lives and therefore to relationships. And EPs are (theoretically) about 'going with the flow'
The fact that I try not to be stagnant and keep things moving in my own life isn't a dis against my friends or my social circle. I would never say that my friends, or even my acquaintances 'bore me'. Also, it's possible to try new hobbies, classes, cuisines, etc. with the same people for a change. In fact, trying new activities with the 'same people' (i.e. my friends) is great fun.
It's good to value what you have and also be able to branch out of the familiar.
Of course, if you realize you are no longer as compatible with a friend, that's another matter. Either you two are no longer clicking and the relationship is no longer as fulfilling or has the same expectations, or you're going through a life shift (entered college, moved to a new town, just broke up with SO, got promoted, or hey whateva reason) where you're a slightly different person and/or have different/new needs.