unrelated to pregnancy

Ladies. Any of you happily married over the moon in love but deep down you know your husband is not the man of your life?! Let me explain. Im 28 happy with my marriage and my life. My first ever real boyfriend i know was the man of my life but i did meet him too early in life. Its been 11 years since we met and 8 since we broke up but i still love him and i know he still loves me. I also know we would be perfect together... i would never cheat on my DH nor do i want to break up with him but i saw a picture of that ex and i just remembered we had said we met too young but we were so meant for eachother... is it just because the first love is special? Any of you ever felt like this?