Long-distance relationships can be challenging, and there are several factors that can contribute to their failure. Here are some of the key things that can kill long-distance relationships, according to the search results:

1. Insecurities: Feeling insecure about the relationship or oneself can lead to jealousy, mistrust, and other negative emotions that can damage the relationship.

2. Different expectations: If partners have different ideas about what they want from the relationship, it can lead to disappointment and frustration.

3. Infidelity: Cheating can be especially damaging in a long-distance relationship, as it can be difficult to rebuild trust from a distance.

4. Boredom: The lack of physical proximity and shared experiences can make long-distance relationships feel monotonous and dull.

5. Lack of effort and attention: Maintaining a long-distance relationship requires effort and attention from both partners. Neglecting the relationship can lead to feelings of neglect and resentment.

6. Unhappiness: If one or both partners are unhappy in the relationship, it can be difficult to maintain the connection over distance.

7. No common ground: Partners who dont share common interests or values may struggle to find ways to connect and communicate.

8. No end date: The uncertainty of when the distance will end can be stressful and make it difficult to plan for the future.

9. Lack of communication: Effective communication is essential in any relationship, but its especially important in a long-distance relationship. A lack of communication can lead to misunderstandings, mistrust, and feelings of disconnection.

10. Lack of trust: Trust is crucial in any relationship, but it can be especially challenging to maintain in a long-distance relationship. Distance can make it difficult to verify information and can lead to feelings of suspicion and jealousy.

To avoid these pitfalls, partners in long-distance relationships should make an effort to communicate regularly, set clear expectations, and find ways to stay connected despite the distance. Its also important to address any issues that arise in the relationship promptly and work together to find solutions.