At times I feel like going out and chilling with friends but after few minutes or hours it's like no I don't wanna go I want to stay in here.... what is it? Is it a symptom of depression or something

Sometimes we find it easier to stay indoors around all our comforts. Sometimes we need time to recharge, and are more introverted than normal. Each day and each person is different. I personally think that the feeling before the interaction is not something to be wholly trusted... focus on how you feel during being with your friends, and after. :)

It may mean you are anxious to knowing what will happen when you arrive to see them and you're hoping nothing goes wrong to prevent it your mind holds you back and have you rethink about your choices.

This is something that so many people have, and i understand how worrying it makes you feel. It sounds like you may be anxious when it comes to social situations. I know it feels better to seclude yourself sometimes, but in the long run, it could actually make these feelings worse. You have to make time for self care, and if thats 1 day a week, or 5 days a week, its completely okay! Maybe telling your friends how your feeling could help if thats something you are comfortable with, and then you may find it easier to spend time with them when they know your situation and understand that you may want to leave, or change your mind about going.