Struggling to Connect with Others After a Dysfunctional Upbringing

I feel like it’s so hard to be close to other people. I had a dysfunctional upbringing that makes it hard to know what I should be seeking in close relationships. I’m so used to being alone and handling things on my own, it’s all I can go back to or remember. I don’t feel like I’m doing well at all socially or emotionally, and while some of this is very not true because I’ve made a lot of progress through therapy, there’s still a big deficit in meeting my needs. Would love to hear how others’ experiences are, and solidarity in this.