Dichotomy.
n. A division into two contrasting parts or categories
The best thing of being a time traveller is that things never have to end, unless you want them to.
The worst thing of being a time traveller is that things never really end, not even when you want them to.
You can never know when your past will catch up to you for another round of heartbreak, or when your future will double back with a pocketful of surprises, mysteries and frustrations.
You don't regret it, you can't. You love your life and all your friends (past, present and future), but it does gets overwhelming from time to time.
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Note: This is a, Insert your favorite Doctor as the POV, chapter. Basically. x)