She broke my trust

We were the three amigos for a bit; Me, DG, and JO. Practically blood sisters. We were both there when DG had her baby. She made us both their Godmother. Then she told lies and ripped apart JO's reputation at an anime convention. As a stupid power play in staff positioning for AMS captain. Not surprisingly, they had a huge falling out. That should have been enough. I really should have known then, but I tried to remain friends with both of them. We'd been together so long, I just didn't want to lose them both. We worked it out, but JO wouldn't go near DG anymore, and warned me not to either. I guess I was too soft hearted.
About six months after that, DG, her husband and I all went to DC and spent all day and night just driving around and celebrating. Celebrating what, I didn't know, but it was "fun"(?). But DG also did stupid and mean things, like locking the door and driving off while her husband was still outside, throwing shit out the window even when I told her to stop, running red lights, verbally abusing her husband, etc. When I asked where my Godchild was, she told me they were staying with their Grandparents. Anyways, it was a rough night. A weird, awkward, rough night. It got me thinking about shit.
I eventually said something like, "Sometimes, you know, it's hard to be your friend."
This just added more to the weird tension of course, but she didn't say anything. Then.
When she finally dropped me off, she told me my goddaughter had been taken by protective services.
I was shocked. She just sped off.
Now, I'd been up all night, putting up with her BS. I was tired. And I was hurt.
I had specifically asked her about my Godchild. And she had bullfaced lied to me. Instead of telling me and letting me share in her pain, she had picked me up in some crazy celebration all-nighter, pretending everything was fine.
I went into my house crying buckets.
You know, stupid me, when a few months later, (after she had gotten her kid back) she called up and apologized, I forgave her.
But I couldn't trust her anymore.
Following that was about a year when I still hung out with her. No, really, I kinda used her. She was trying to regain my trust by dragging me out to concerts and such. Trying to have a good time, like the old days. She even payed for me and drove me places, but my heart wasn't in it. I didn't want to get hurt again. I should have just drew a line, but I was also slightly scared she'd do to me what she did to JO. You were either with her or against her and she smeared anyone against her. So I tried to just drift away. Ghost her, if you would.
I'm not proud of it.
She was also becoming more erratic. She started cheating on her husband, first quietly, then openly. She even started dragging her boyfriend and husband to events with my parents friends. She also started doing amateur cosplay porn. And bragged about it to me. Like, I did not need to know this information. @_@ I really didn't.
Eventually, I think we both just gave up pretending. I realised we were just too far apart; moralistically, emotionally and yes, financially. She had a good computer job and I was working at Joann's. I didn't want her to take me to NYC or pay for my food.
I just wanted it over.
So I said some things about my experiences to her "new best friend" at an Anime convention. She didn't believe me, but I'm sure my words got back to DG.
We never spoke again and I stopped going/staffing that convention. I blocked her on FB, etc. Have no clue what she said about me and I didn't care.

I've seen her twice since then. Once, soon after, at a concert of a band we both loved. And again, the other day, years and years later, at IKEA. Both were super awkward.

Me and JO are still besties though, in case you were wondering. But JO isn't toxic and any growing pains our friendship has had, such as believeing DG over her, we've worked out. I worry about how my Godchild has grown up every once in a while, but realise I have no say in that and haven't for a very long time now.