What happened to my love? Please help me finding a solution.?

[Aniket]

Hi! before 5 years when i was just a 16 years old teenager; i fallen in love with a girl who was of d same age as mine. it was true love. i loved her very much but i could not convinced her to love me back & then one day i suddenely came to know that she loves somebody else.
from that day i did not see her again as i tried to forget her. after sometime she moved to some other city. i did not have her contact no. she doesn't use social media & i didn't know her adress. i loved her very much & so i realised that i could not live without her. i tried to find her everywhere. i was searching for her for 4 long years and on one day; i found her. she got a job in my town. i spent some time with her & told her everything. she emotionally got touched and started loving me very much.
now she loves me very much. but the feelings that i had for her before 4-5 years is actually absent. i don't why! i mean i was crazy for her & now she loves me very much & i am like 'i don't care'. she got thin & look different no. is that the reason? i got that feeling when i saw her after such a long time but where is it now?
should i get it some more time? i mean she is the only one i loved & dreamed about. I can never hurt her! Is this some pschycological change? or my love lost with time. can you please help me with this.