I don't understand why this is happening. Why do I feel this way?
The first step to answer your question is to reflect on what is going on in your life overall. If you're in the midst of severe stress, whether within your relationship or effort to establish a relationship, upheaval in family dynamics, some type of significant loss like a job or someone with whom you feel closely attached, then you may simply be creating the solitude which is necessary to better understand and absorb the meaning of these changes.I assume you mean you are by yourself when you are indoors.What you write sounds like you're not happy with this recent urge rather than that you and someone or others are having great and fun times together.One way to encourage yourself to go back outdoors is to connect w a friend or search for an interest within you to develop.This way with either of these, you'd feel a little bit of motivation to join and get more involved with either of these.