Would you start a relationship if....?
you knew you were moving in 3 months.
depends how old you are, if there is any chance that you would be near each other soon, than yes, other wise a definite no, no matter how much I wanted to!
unless you could convince your parents or whoever takes care of you not to move, or if you are not moving that far away
You can just make it a friendship, it doesn't have to go past there. I have friends all over the world.