After quarreling with my boyfriend, he sent this message saying: feelings are like bank deposits. Once you quarrel, you have less savings. What do you mean?

Feelings are like deposits in a bank. In fact, what he wants to express is that the feelings between you are actually like deposits in a bank. Every time we quarrel, there will be less money in the bank. If you quarrel to a certain extent, the deposit in the bank will be completely gone. However, the relationship between you is like a deposit in a bank, and it will be completely gone. At that time, you two will face the situation of breaking up, so I think that's probably what your boyfriend means. Quarrel will affect feelings.