When do you give up on love?

I guess you should talk about this with her. Maybe you just need to communicate each other's feelings to know where each of you stand and find out answers to several questions. People do things for reasons some may not want to acknowledge or say. =)Maybe you both haven't had any closure yet that's why you can't get over her.

you have Not mentioned That now you have divorced & how she cheated you. It difficult to answer your answer without knowing properly.

i give up on love when there's nothing that i can do to regain what i've lost, besides what's the point of loving a person if the person does not love you anymore? its useless right? the best thing to do is to give up the love you have and learn and love again. that's the way life goes.