I have been with my boyfriend for three years, and everything else is fine, but when it comes to money, if it is impossible to put all his money with me, he is still wary of me.

To make a man willing to hand over his financial power, he must first feel worthwhile. He didn't do it because he didn't think it was necessary. You are not worth the price. If you force him to have it now, it may make him full of resentment (because he won't give it to you), or break up without giving it to you, or get revenge after marriage (for example, finding a mistress won't make you feel guilty). The best way is to raise his "price" and let him pay willingly. Secondly, when he makes a mistake (not a small mistake, of course), you usually give him a hint of injustice. It is safe to carry it like this. In addition, controlling a man's money does not mean controlling a man's heart. It's no use controlling money if you have no confidence to attract him. What's the point? Are you not optimistic about this relationship at all, leaving yourself a way out?