As to the boredom question, I agree, heaven would become an agonizing place to live. Especially if hell also exists; imagine having to spend eternity knowing some of your loved ones are being tortured for eternity and there's nothing you can do about it, just because they committed sins and didn't repent.

Anywho, in an eternal heaven, you would eventually experience everything there is to experience. Then you would experience it all over again. And again. And again. For all eternity. Experiencing everything there is to experience over and over and over again. You'd be begging God to end your cursed existence once and for all.

We are temporary creatures. We die and then we're dead forever. Let's not forget that it's a good thing.