Coming out to my aunt this weekend

I'm a 26F and I'm a lesbian. I came out to my mom and friends many years ago and they all know and are okay with it. My internalized homophobia is really, really bad though so I don't usually tell people my sexual orientation ever unless absolutely necessary, even online.

This has made me put off coming out to my extended family for years and I was okay with that because we all lived so far away from each other. My mom also isn't exactly thrilled by my orientation so she basically told me it's my responsibility to tell our family.

Me and my girlfriend, who I have been with for 5 years at this point, are going to be moving pretty close to where my extended family lives. Not telling them I'm moving close by would hurt them, but if I tell them that then they'll want me to come around more often and I'm at a point where I wouldn't feel comfortable excluding my girlfriend and hiding her from that.

I'm having a phone call this weekend with my aunt where I plan to tell her I'm moving close by and come out to her about my orientation and my girlfriend and basically tell her that it's okay to tell the rest of the family. I'm feeling very nervous about this and keep going back and forth about if this is a good idea.

I've talked to some LGBT friends who all seem confused about why I would even want to come out to them but for some reason I feel like I should but them questioning me is making me have so many doubts.