How have you protected her like a big brother? I would not send flowers. I would not interrupt her during working hours. How 'bout calling her to say "hi" or sending her a nice email? You don't want her to pee her pants, do you?
If you are already friends, just letting her know that you are there is a good start. When one relationship ends, a person needs time to heal before starting a new, lasting one.
Blessings,
~ nmpb ~