Pisces. ;)

The glyph for Pisces shows two fish swimming in opposite directions, and this is symbolic of the Pisces nature. Pisces is a sign pulled in two directions, always trying to balance. Pisceans sometimes appear fickle or unreliable because they change their minds so frequently and what they wanted very much one day may repel them the next. Some appear to be drastically different people from one day to the next, and they have a tendency to make huge, life-altering changes on a whim. More consistent individuals find the Pisces personality aggravating, baffling or intriguing.

Need for Solitude

Pisceans are receptive to a wide variety of energies, both good and bad. They can catch the moods of others like viruses and pick up emotions by proximity, which is why they need more time alone than those of other signs. Pisces people go through alternating sociable and reclusive phases, retreating from the world when their craving for solitude kicks in.
Pisceans are very sensitive to environments and need to be cautious about where they choose to live and who they spend time with. They do best with friends and romantic partners who behave consistently and act as solid anchors in their lives.