The 8 roses are not in any research so it's quite possible the person who sent them may not have been able to afford more than the 8 roses. Here are the number of roses sent and what they mean:
1 Rose
Exceptional love all concentrated on you.
2 Roses
Two of us deeply in love.
3 Roses
I love you.
6 Roses
I want to be yours.
9 Roses
Love each other eternally.
11 Roses
You are the one I love most in my life.
12 Roses
Satisfactory union and mutual affinity.
13 Roses
Secret admirer.
24 Roses
Remember fondly every moment
(24 hours cannot forget you).
33 Roses
Saying "I love you" with PROFOUND LOVE.
36 Roses
Feeling romantic attachment because you come to me.