Justin Bieber and Selena Gomezs relationship hitting another rough patch?

Selena Gomez and Justin Bieber have been the subject of breakup rumors and engagement rumors ever since they began dating nearly two years ago.

This week, Gomez, 20, fueled both marriage rumors and rumors that there is trouble in paradise.

According to Celebuzz, the Love You Like A Love Song singer was spotted with a self-help book that gives tips on how to make love last. The book, titled The 5 Languages of Love: The Secret to Love That Lasts, is aimed at married couples looking to keep the spark alive.

A Justin and Selena engagement still seems like it would be far in the future since she recently said, "Marriage and all that other stuff will happen once I feel accomplished in every other aspect of my life." So, does this mean things are cooling off for the young couple? Maybe, maybe not.

While its easy to start rumors, Bieber is currently putting all his focus on of his upcoming Believe Tour. He recently tweeted about rehearsals. The tour kicks off September 29.

As Gather Celebs New Channel suggests, Gomez may have been looking for tips on how to keep the spark alive while having a long-distance relationship, since Bieber will be touring until January 2013.

Image: INF Daily