Answer:
When you feel that the other may be stressing you out, or you may be stressing yourself out, with trying to love them, while trying to juggle school and sleep and your phone at the same time. More then likely when the other person may be more distant, or even if they make you feel claustrophobic. Not literally, of course, but when you feel like you have no space for yourself, or any alone time.
Explanation: Hope this helps..