My first girlfriend, who I loved with every fiber of my being, broke up with me in summer of 07. It didn't bother me much at first but it slowly it made me depressed, distraught and eventually turned me into a weeping pile of shit. She cut off all contact from me, eventually moved away, and I haven't talked to her since. I still check her facebook and myspace all the time, and I masturbate (very easily) to her pictures (both old ones from when we were together and new ones).
I still have every thing she's ever given me. Birthday, Christmas, etc. When I look at other girls, I look for her similar qualities in them, her mannerisms, quirks, etc. I look for girls that are similar in her petite, slender build (I never liked petite girls before her, now I can't even fap to average sized girls).
She royally fucked me up mentally and even though I acknowledge this I can't stop myself from behaving like this.
I miss her so much and I think about her every day.