Can't get her out of my mind

After I frist set my eyes on her in 1988 or 1989, the feelings developed after we had a very deep touchy relationship and we do said I love you when see each other every time until 1994, her mother found the letter then cut us off then things changed between her and me so she did tried get my attention few times but I did not realized her then in 2003 finally I realized her then tried to talk but failed cuz she was a teacher that time as was her mother as she was in our business then we could not talk then I was tried to find her until in 2006 at circus again I did not realize her but did saw her sister who passed by me to get attention and did not say anything as afraid then when I final found her again and contacted her which is school email in 2008 so didn't know that she got married to different man and got two more kids and as excited I was hope to hear from her but heard nothing from her for few months as I email her about tenth times after I wrote a love poem then final she said do not contact me again so of course I was deeply hurt and told her how deeply hurt I was. Now I tried to get her out of my mind and tried to move on but she in my mind all the time because she was love of my life and my first love so she knew that she is of my..... is this normal?