What if you had vampire immortality, such as in the Twilight series?

Yes, I’ve read all 4 Twilight books, don’t judge me! Also: SPOILERS ahead, if you care.
So, the conclusion to the saga got me thinking… Bella gets what she wants, vampire life 4ever with Edward OMG!!!1 For a while, I thought being a vampire was pretty awesome. Beautiful, indestructible, impossibly strong, fast, no biological functions. There’s so much you can do. And Bella is with the love of her life and her daughter, pretty much set for eternity. But then I thought… holy crap, that’s gotta get really f*cking boring after a while. Sure, a century or so might be entertaining, visiting every corner of the world. But eventually, you’re gonna run out of stuff to see and do. And you’re with the same, unchanging coven. Unable to get close to humans because a) they die and b) can’t know your secret, so basically your interactions are limited to your small vampire coven for eternity. I think eventually I’d destroy myself just because I’d go mad! How would you handle immortality?