What does it mean that my boyfriend won't accept my red envelope?

Judging from your description, you gave your boyfriend a red envelope and he didn't accept it, which means there are too few red envelopes. Actually, your boyfriend is joking. He doesn't want to accept your red envelope because in the process of love, boys don't want girls to pay.

Obviously, your boyfriend did the right thing. He will give you a red envelope at night. It can be seen that his love for you is deep and long.