Thi girl i like is always extremely stressed out, how can i help her through it?please help?

We both like each other, shes given me all the hints, but im too stupid to ask her out, but im now to a point where im going to do it, but i want to do it in a special way to at least let her know i care for her. The thing is ,shes always stressed from study, and is always telling me this too, so i was thinking of getting her something to remind her to stop stressing out, like a cool gift she can look back at?.....need ideas. Its gone out of control, as i think she thinks i dont like her back, cause ive never really showed her any signs, apart from being around her, and shes always giving me hints....what should i do, she started asking me bout whether she should get back with her ex or not, and other stuff as well....but she flirts with me heaps.....i need to do something to show i like her though, it looks as though she thinks im not into her, which is totally the opposite, whats a good gift to get for a stressed girl?