I think that Christians don't get what "eternity" means.
Quite the contrary, it's unbelievers who have no clue what eternity means, or what it will be like.
One thing we Christians know, our Lord and Creator will be there. The chief aim for those who enter into relationship with Him is for us to glorify God and enjoy Him forever.
If you think this heaven and earth are something to behold, our God promises that when this age comes to an end, He will create a new heaven and a new earth for us to dwell in throughout eternity. I promise you that I won't be bored in God's new heaven and new earth.
I can't say the same for you.