Have you had a "falling out" with a friend? + Young Love and Marriage

Me and a "friend" had a "falling out." Now I don't know all the reasons for this, but one of the main ones on her side is that ever since she started dating her soon-to-be husband (about a year ago, our senior year of high school, yes I know those are kinda shocking I think since I wouldn't particularly recommend early marriage, I've seen too many marriages like that go awry) since has ignored me and my friend D. We three used to be like a freakin' trio all the time. Me and D are still super close and she's one of my best friends, like a younger sister (she's 6 months younger than me hehe) to me, and whom I pretty much talk to every day. E (the ex-friend), only talks to us when she wants something from us. Stupid us would help her out when she needed it (let her borrow a movie, let her borrow money to pay her and her sister's rent that never got paid back, this and that). We gradually started to realize, E is NOT a good friend.

A bad friend constitutes as someone who:
ignores friends when she gets engaged
destroys friends' property "accidentally" and doesn't take responsibility
tells friends they will "go to hell"
borrows money and does not pay it back (D and her mom loaned her quite a pretty penny and for that D's brothers despise E)
acts as if friends are stupid
acts as if friends are especially ignorant for not being of the same religion
brings a LOT of people down by making "comments" that are not-so-obviously-yet-very-obviously meant to be hurt them (she totally did this to a lot of people at our school it was awful and I'd call her out on it)
contacts friends only when they need something
ask things like "how are you?" without really caring for the answer

Basically that's my rant and why we're not really friends anymore.

Me and D suspect E is not our friend anymore because of the whole religion deal. I think that's ridiculous. You should accept your friends for who they are not what they believe in. Unless they're satanists. Well maybe even if they're satanists, just as long as they don't go sacrificing virgins or something similarly immoral.

No matter what folks, you shouldn't forget your friends as soon as you get a boyfriend/fiance. That's just lame.

Question:
Have you had a falling out with a friend? Why? Do you have/had a friend that ignores/ignored you because of the boyfriend/fiance?
I see that type of nonsense in YA books quite often so just curious :)