Depression for betryal Vs Study Pressure

I had a 3yrs relationship during my btech & she left me as her parents pressurised her,but till now she says dat she loves me as before & I'm also every-time thinking about her,dat time we also had physical-relation so many times.Now-a-days we don't talk regularly bt follow each other on socialmedia sometimes we talk,means once in 4/5 days or once in a month.At the time of talking we both becomes so happy bt if the call lasts for long duration we both quarrel with each other & another thing is dat she lives with her husband & she has also the physical relation with him.As she said she has to do her duty whatever she feels inside.she also said dat she has not any emotional relation with her husband dat her husband comes from office,takes dinner,den do sex,then sleep,then repeat,no conversation & nothing.And I can't believe that.Then it's my carrier's most vital time,bcoz of I belongs to middle class family I have to study hard & get the job.How can I handle this sir ??please help me out