You should try to stay in contact with friends.
Gavin has been depressed lately and it has only been getting worse.
Gavin wants to focus on dealing with his depression.
Gavin starts going to therapy, and sends his friends a text with updates on what he's going through every couple of weeks.
Gavin stops returning his friends calls and texts and focuses solely on trying to get through his depression.
Gavin's friends send him kind cards offering encouragement and support which makes Gavin feel really good.
Gavin's friends whom are unaware of his depression assume he doesn't care about them, and stop trying to reach out to him.