Need an Advice

I am 16 and currently in High school. I changed my school last year thinking I would adjust with new people and to some extent I did. But recently I am feeling a bit different. I miss my old buddies. I feel like I am not a part of the new friends I made. Apart from these the thought that makes me feel more worse is that unlike the people of my age I never stepped out of my home alone. Never hanged out with any friends. I was okay with it but now I feel a part of me is being isolated. Feels like I am being trapped in my own house. This feeling has been growing stronger in me making me wanna leave this place