Lost focus in my studies. Responsible.

Hi my girlfriend left me.we were in relationship for 2 years.the problem started when I didn't talk to her because I was very concerned about my studies and we couldn't spend a minute for 3 months.she was very emotional.she has no other thing to do except making friends and talking in the phone for long long hours.when I neglected her she started hating me.her hatred grew so much that she had affair and all physical intimacy with another boy.when I got to know about these things I felt myself responsible.so I tried to patch up with her,but it was too late.these things made me unrest.I become desperate to get her.I tried every tricks to get her back but all went in vain.i naturally started to remind our private intimate moments.these memories made me more dsprt.I missed her physical touch.I went into trauma.I become very depressed.this sad time period has caused me weak.my semen became watery.I am totally weak now.I lost my concentration.i want to get back my concentration and strength.