In other words, think about whatever you think he is using you for, and get rid of it completely. Then, observe his reaction. In a healthy relationship, there should be several things that make your partner feel happy and fulfilled. If the relationship suffers greatly because of one change, this might be a problem. If he only wants to hang out in the bedroom at night, tell him you’d rather start going out during the daytime. When he initiates physical intimacy, remind him that you aren't interested right now. Ask him to respect your boundaries.  If you aren't sure what to say to him, say, "I want to focus on our emotional connection, so let's hold off on the physical stuff for now." His reaction will let you know if he's using you or not. If he cares about furthering the relationship without sex, he will stick around. If he doesn't want to be with you if he isn't getting the physical intimacy he wants, ditch him. Remember, it is your body. The most important thing is that when you say "No," your boyfriend respects that. Tell him that you don’t feel comfortable spending money anymore, and give an excuse if you need to. It’s completely understandable if your boyfriend doesn't have the money to spoil you, but it’s not OK if he demands that you spoil him. If the interest is gone when your money is gone, that’s bad.  Tell your boyfriend, "I really need to start saving my money, so I am going to cut back my spending a lot." Then, if he asks you for money or to pay for something, you can remind him of this. Again, his reaction will tell you what you need to know. The same approach can be taken with any other thing your boyfriend might be using you for, such as popularity, gifts, etc. It may seem tough at first, but a quality boyfriend will stick it out if he thinks the relationship is worth it. When you feel like you’re blissfully in love, you may not notice if your boyfriend isn’t doing anything for you. It’s easy to be so infatuated with someone that you make excuses for them. However, start paying attention to...

TL;DR in Vietnamese:
Ngừng đáp ứng những thứ mà bạn nghĩ là anh ấy nhắm tới. Nói với bạn trai rằng bạn muốn lắng xuống một chút nếu bạn nghi ngờ anh ấy đang lợi dụng bạn để thỏa mãn nhu cầu tình dục hoặc các hành vi thân mật khác. Cẩn thận với túi tiền nếu bạn ngờ rằng đó là lý do anh ấy “yêu” bạn. Chú ý những việc anh ấy làm cho bạn. Nhận biết sự khác biệt với những lời khen ngọt ngào với những lời tâng bốc. Dành chút thời gian ở riêng một mình.