Why does everyone disappear- when deployed😢

I hear all these people say hey lets do this, lets do that while your husband is gone, used to get invited to everything before ... but as soon as my husband leaves my phone literally hasn't gone off once, not even responses to my messages and I see all the Facebook posts of the events and get togethers they've done. Makes for a very lonely year and feels personal. It's been a full 3 months. Makes me question what friendships are truly real . Happened during his first deployment too, but figured it was the group of friends at the time. Guess not 💔