I am dating a wonderful guy and he is the only person I like at the moment. I don't plan on us breaking up anytime soon either. But my friend(casey) who is a guy asked me would I rather go out with him or my boyfriend. Of course I said my boyfriend. But the next day he asked out my best friend. But casey told me when me and my boyfriend break up he will probably dump my best friends and ask me out. I already told my best friends that he told me that. She said she would be fine with it because she wouldn't want a guy to ruin our friendship. What should I do?