Go on one-on-one outings to the mall or movies. Maybe go out in the evening. When you first see her (make sure you're alone to avoid any unwanted ears) say something like "Wow. You look beautiful." And smile. If you want to ask her out, then pick a place where you'll have some privacy, and a time when she won't have a lot of other stuff on her mind. Though you don't want to wait around forever to pop the question, you should work on finding some privacy, and making sure she'll be in a good mood. For example, don't pull her aside right before her big math test, or she'll be too distracted and stressed out to listen to you. Once you've found the time, get her alone, trying to be as casual as possible. If her friends are five feet away, you won't be able to have a good conversation. Don't make a big deal about it. Just give her a few compliments and tell her how much you like spending time with her. Let her know why she's special to you and that you're paying attention to all of the things that make her wonderful. Don't make her too embarrassed or lay it on too thick; just take a few minutes to make her feel like the special girl that she is. You can even gauge her reaction as you're doing this -- if she looks uncomfortable or like she's searching for the nearest exit, then you may not want to proceed. But if she's excited and looks like she wants to hear more, then you may be in luck. Don't spend too much time building up to it. Just tell her that you've really liked being her friend, but that you want to take your relationship to the next level. Make her see that you've really thought about it, and that, though you value your friendship, you're willing to take the risk to take your relationship to the next level. She will be flattered that you like her so much as a friend and that you've put enough thought into it to see that you do want something more from her.  Just say, "Would you like to be my girlfriend?" Or, "Would you like to go out with me?" You don't have to spend hours building up to this point. When...

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Write a summary of the previous text in Vietnamese:
Trở nên mạnh dạn hơn đôi chút. Lựa chọn thời gian và địa điểm phù hợp. Nói cho cô ấy biết lý do bạn thích cô ấy. Mời cô ấy đi chơi. Nếu cô ấy từ chối, không nên để điều này làm hỏng tình bạn của cả hai.