In your pre-posting questionnaire, you wrote that you’re 18 and your boyfriend is 21 and that you’re engaged to be married in a year, and you’ve been dating for a year, so far. It sounds like the two of you are committed, and these thoughts you have of someone else or the idea that your boyfriend has similar such thoughts, are eating you up inside with guilt. Relax. It’s normal to think about other people, and even to flirt with them. That doesn’t mean you’re acting on those thoughts. That’s the bigger deal. 😉 You’re in a relationship — you’re not dead! Focus on the relationship and be understanding of human nature. Flirting is fun and it can make you feel alive. If it doesn’t bother your partner then it’s not doing any harm, and it may make you feel better about yourself — and ironically, your relationship, as well, as a result. I hope that helps!