Will she remember???

Well I gave this girl I liked a pearl that I got out of an oyster and had put on a silver necklace. I would have given it to her on our senior trip but I was too shy...I gave it to her after graduation a week later. I dont know if she liked me back, I never told her I liked her. Do you think she knew after I gave it to her? Do you think she will remember me along time from now?