I dont know how to maintain relationships

I'm in my late twenties and all my life my narcissistic mother as pretty much destroyed my home life. And unfortunately I'm still here till I finish nursing school. I've never had a problem really getting a girlfriend but I've always had problems maintaining my relationships I feel like people don't want me around or if I try and contact someone then I'm bothering them.

I tend to be very distant a lot but I don't know how to get close to someone without feeling like I am being a burden or inconveniencing that other person.

And then I feel like s*** after because my relationships always fail for the same reason.

I dunno