Just because OP takes medication after a break up, doesn't mean it's a "normal" life situation for them. They could have suffered from depression before, it's not even clear if they started only after medication. The break up could also bring up some childhood trauma, like the loss of a loved one. What seems to be a normal life situation to someone might not be a normal life situation for someone else. I agree though that if no depression is diagnosed it's a bad idea to take antidepressants.