Limits in love

Does love has limits? I feel that there should be. When love becomes limitless, you forget yourself and live for the other person. What if that person has kept a limit? And they dont really care about what you do for them and sacrifice in life for them? I dont think I can survive a situation like that.

There are so many who are taken for granted in love. You keep giving without getting anything in return. How long will you carry on like that?