Friendship is supposed to be for each other, not against each other. Spending time with friends is important. You may neglect your closest friend by failing to spend time with them, refusing to attend to them, forgetting to return their calls, and pretending to be too busy to spend time with and for them. This is not only hurtful, it's also dangerous because your friend will feel abandoned if you don't have their back. The best way to show your friend that they are not just another friend is to pay attention to them and listen to what they have to say. Doing this will demonstrate that you value them and their opinions. Also, make an effort to get to know them better by going out with them or doing something together every now and then. This will help prevent feelings of abandonment from coming between you two. As long as you aren't being abusive or neglecting them, it's safe to say that you can ignore your friend. However, if you want to keep the friendship strong, you should still try to spend time with them even if you aren't feeling particularly like it. They will understand if you tell them that you don't feel like going out but would still like to be friends.