I've been feeling lonelier as time goes by, what should i do?

People always say I should try new things, but I feel like I just can’t. I’ve become such an overthinker that it holds me back. I’m afraid to step outside my comfort zone. I rarely leave the house because I don’t really have friends who invite me out. I’ve tried making friends online, but I often feel different from everyone there.

I’m more of a reserved person who tends to wait rather than approach others. So when someone reaches out and wants to be my friend, I end up hoping they’ll become my closest, most meaningful friend. But to them, I’m usually just another casual friend.

Both in real life and online, I feel stuck and unsure of what to do anymore. So now, what should I do to fill my time? (I'm sorry if my english feels confusing to you, I'm trying my best)