If they were hoping for something more, then the conversation might be more awkward than you'd hoped. But still, stand your ground. A relationship only works if both people want to be in it, so it's totally fine to be the person who still wants your summer fling to end. But as long as you had a good relationship with this person, be kind. “Even if your mind is made up and you’ve already moved on, try your best not to be callous about how you break things off," Maynard says. "Honor what you shared together, affirm what you really appreciate about the other person, and respect them enough to give them a chance to respond." It can also help to explain why you're not interested in a relationship. Maybe you were off from school or work for the summer and now that you're going back, you don't think you'll have time to be a good partner. Or maybe you always thought of the relationship as something that was fun, but don't think that you and this person make a good match for serious dating. Being able to give a reason could help soften the blow.