Question:my girlfriend makes me wear feminine clothes?

my girlfriend picks out all the clothes I wear. Some of the items she picks out are feminine, like slacks that zip in the back, pink or floral tops and she has evien made me wear panties. It is embarrassing when out in public or when her friends come over and tease me and make me show my underwear. Ive tried to talk to her but she gets mad and threatens to leave me until I apologize. I dint want to break up and am not sure what to do?