My boyfriend won't believe me whatever I say. What should I do? How should I answer him?

If your boyfriend has lost trust in you, then you need to seriously consider your relationship and future direction. Here are some suggestions:

1. Talk frankly with him: Talk frankly with your boyfriend and ask him what he thinks and feels about you. Tell him your thoughts and opinions, and try to make him understand your position and motivation. At the same time, we should respect his thoughts and feelings.

2. Find out the problem: Try to find out the reason why he lost trust. Is it because you didn't keep your promise or tell the truth? Or does he have a different view of your personality or values? Only by finding the root of the problem can we solve it better.

3. Take action to prove yourself: If you do make a mistake or do badly, then you need to take action to prove yourself. Let him regain his trust through practical actions and prove that you are trustworthy.

4. Consider the future direction: You need to consider the future direction between you. Do you have the same goals and values? If you have differences in these areas, then you may need to re-evaluate whether this relationship is worth continuing.

Finally, no matter what scheme you choose, it must be based on honesty and respect. A relationship needs to be based on mutual trust and respect to last.