It can be difficult when friends leave and it can make you feel lonely. However, it's important to remember that friendships can change and evolve over time, especially as people's lives and circumstances change. It's also important to recognize that friendships are two-way relationships, and both parties need to put in effort to maintain and grow the friendship.

Sometimes friends leave for various reasons such as moving to a different city or country, starting a new job, or getting involved in new social circles. These changes can be challenging, but they can also provide opportunities for growth and new connections.

If you find yourself feeling lonely, it may be helpful to seek out new friendships and social opportunities. Consider joining clubs, attending social events, or volunteering in your community to meet new people who share your interests and values. You can also reach out to old friends and make an effort to stay in touch, even if you can't see each other as often as you used to.

Remember, it's normal for friendships to change and evolve, and it's important to focus on building meaningful connections with others while also taking care of yourself and your own well-being.