Backstory:
My girlfriend has had two boyfriends in the past. One was an AFC, and the other one seems like he was naturally alpha.
I have not met him or heard about him, but I'm assuming he was alpha because she keeps talking about how much of a dick he was to her, and how he tried to finger her in public etc. She will say this in a "You are so respectful and I love you. My EX once did this he was such a dick blah blah"

She seems genuinely sad when she brings him up...but she IS bringing him up.
It's bothering me.

Yesterday she said "My friend asked me if I'm sad that this girl is going out with my ex now. And I said "NO way. I don't even care about that. I'm so in love with this new guy (me) that it doesn't bother me in the slightest"

So yes, I GUESS you could take that as a good comment....but her bringing him up - does that mean she still has feelings for him?
And the fact that her close friend even asked "Does it bother you that he is dating another girl" suggests that her close friend might KNOW that she could like him or something like that.

What do I do?
The problem is that I think she still might like him. Maybe im over analysing it and she doesnt, or maybe she does. What do you think?

Stay unfazed and aloof. If it bothers you that much, try and find out if she's still attracted to this guy or if she still "like" him. If she does, increase the attraction level (withdraw attention, etc). If still still mentions him afterwards, dump her asap. She might say he's a dickhead but deep down inside she wouldn't mind you being a dick now and then.

you have to start controlling your own reality

it is impossible and counter productive to try to control her reality,
she is seperate from you, and you seperate from her,
what you can control is your own actions, dis-interest in the topic without reacting to it can encourage that topic to not re-emerge, not only that but you could easily cut her thread and introduce another, or take her topic to the extreme for a sexual experience, if she says You are so respectful and I love you, My ex-bf used to try to finger me in public, you would never do that! (this is your cue to say, of coarse I would never do that and attempt to finger her)

take what you like, disguard what you do not
do not attempt to do things to impress/please her, do things that you want to do, you are the leader not her, you make her feel good because you want to, not to impress her so she likes you
GOOD LUCK