Heyy I’m so sorry you are feeling this way. But you’ve taken the first step in reaching out to people. First thing for me would be to figure out and list out all the things you like or enjoy and bring you comfort. And use this as a way to find and connect with people
Would you like an online friendship?
I completely understand I've been with my husband for 10 years I moved away from everyone and everything I ever knew and unfortunately I lean heavily on him because he is all I have. We have kids so that has helped keep me busy but I often trap myself in my own prison whether that's my mind or the house. Which only makes me more anxious. Try finding something that you like doing some kind of hobby maybe even getting a hammock if it's an option and trying to get outside in your own space even just a chair and practice being outside in your own space with a book, or coffee or something. Then maybe try working up to taking yourself to lunch even if that's going through a drive thru and parking somewhere and eating in the car. Those are some things that have slowly helped me help myself.