I sacrifice by listening to her talk about beauty YouTubers because she tolerates my own rants about, well, everything. When a husband or wife, boyfriend or girlfriend, violates one's expectations about what is appropriate, people feel betrayed. Jump to Interacting with Your Girlfriend Is Cheating on Her? I slept with my girlfriend's best friend and I have been together for a year, and I'm crazy about her. A Man's Story Of Cheating On His 7-Year-Strong Girlfriend.