GreenPearl has a lot of good ideas. Personally I think it's great that you're jealous (don't take that the wrong way) ... it just means that you still love her and want her to know how wonderful you can be to her.
If she's a flower kinda girl, send her a single flower with a note attached telling her you were just thinking of her. I'm allergic so as an alternative, my husband will occasionally (but not too frequently) send me a fake flower with a note saying he'll stop loving me when it dies, or a special something in my purse for me to find later. Work to your strengths. If you're good with words, write her a poem, music= a short song with no words. Something purely you. Only you will know what she'll really love, but hopefully some coaxing suggestions will stretch out those creative muscles.
The bit Pearl left about sending her a car to bring her to you is a Fantasic! idea. Send her a note telling her to be waiting outside at a certain time. (Might want to send her a special outfit too, cuz no woman wants to go on a date in her work attire!!) Was there anything you used to do when you were dating to show each other you loved one another that you haven't done in a while? Or a joke the two of you used to laugh at and haven't thought about recently?
Just letting her know you remember what brought you together will say a lot.
And as far as scents, take a sneek over to a Macy's or something and ask a professional opinion of Hollister's variety and choose what YOU like from it. If you don't like the way you smell, won't matter if she does.
But don't let on. Just put it on one day and surprise her in the morning before she goes to work. Then she'll be thinking about you whether she wants to or not
Good Luck! She's very lucky to have someone who cares enough to dare asking a woman's opinion!