how do you know when your relationship is over?

First thing would be he/she will not like to talk for more time. Try to finish the matter early and leave saying I have this and that work etc. Second sign would be not responding of your calls properly. May lift mobile/phone after many calls and say please call later, I am busy this time. Third thing would be whenever you ask something, reply will not be positive, just in yes or no. Stopage of calls from he/she. Forth thing would he/she would avoid to go with you. These are the priliminary sign of separation.