Boyfriend doesn’t listen.

So idk why but sometimes I️ haven’t been in the mood lately, to have sex or anything. So my boyfriend will just touch me and make me feel uncomfortable. I️ tell him no and to stop because I’m not comfortable/feeling isn’t mutual. But he still continues to do it until I️ scream and become a huge bitch. So he’ll finally leave me alone afterwards but I️ just want him to learn how to take a “No”. But he doesn’t ever listen..