While you are abroad it is important to maintain contact with your friends and family back home. Make sure you have a platform that works for both of you to reach each other. That being said, you also need to make sure you make new friends and stay involved abroad. Remember that you're studying abroad for many reasons, and one is to learn about another culture and community.
If you are looking for ways to get involved and make friends, talk to the program exchange coordinator. In addition, there are usually many activities planned for international students. This is a great way to meet friends from around the world as well as locals.