Answer:
not always just 1 in 100
Added:
The average person will fall in True love 7 times in their life before settling down.
So Yes it could be true love, and your first love you will never forget, Even when your 50, you'll still remember him or her.
Like in my case I have been in love 3 times, and True love, I mean I was so unhappy and sad, I miss him like crazy and i could not stop wondering if he was okay while i was away for over a year, once in my life. I am lucky that when i got back he felt the same way about me......
Just know that it maybe your first but it does not have to be last, and enjoy the little things with them