Creating tension between your characters is great. Everyone can't get along all the time, and showing tension helps foreshadow future conflict and peak interest. Tension is important.
Tension, like everything else in your story, however, has to be believable.
If you go too far, readers won't believe that your characters are just putting up with the tension. They won't believe that these humans are living together and aren't snapping, slapping, or finding a way to separate each other.
Too much tension leads to people separating, not adding tension.
Absolutely add tension to you story, but also know where that tension should stop.