I have lent money to my boyfriend for half a year now. When I borrowed it before, I said I would pay back my salary. I haven't said a word yet. What do you mean? he

In this case, he may have forgotten. You can try to remind him, maybe he will pay you back.

Another possibility is that the amount of money borrowed is not large, and after a long time, he deliberately pretends to forget and does not intend to pay you back. If so, you can consider whether to ask him to pay you back.