I found, in my personal experience, that after I was finally able to create a healthy attachment with my family, it became easier to make friends and be able to be honest and vulnerable with those people. It takes a lot of time, but even in romantic relationships, you have to learn from your supports growing up. That's how we learn. It's by seeing other people and thinking, “Okay. This is normal. This is what it's supposed to feel like.”
They say, biologically, it's very common for children to look up to their parents and say, “Oh. That's a healthy relationship. That's what I want.” Their parents are supposed to be there to support them and make sure that they're getting everything they need and that they have all the necessities.
If you don't have that and you don't have that relationship, it's very difficult to move forward in life, build trusting relationships with employers, keep jobs and continue to create different relationships with other people too.