Their are many ways of telling one a relationship isn't worth it anymore like one your lover stops trying anymore an its only you trying to make the relationship work or if he/she starts treating you like you have to compete for his/her love or if he/she starts stops caring about your needs but really who to tell how you know a relationship isn't worth it anymore is one you feel like it isn't an you don't want to keep trying for your relationship to work an that is one its time for the relationship to end