I already know some will see the title and think I'm all bad but thing is that she her self acknowledges it as a problem and is worried that she's a bad girlfriend (as to which I assure her that she's not)

So a little backstory, she was always the kinda forgotten kid, having three younger sisters. She was never really allowed to do what she wanted, talk about her special intrests, or even have any opinions about what music to listen to in the car. Now since I'm very open to the fact that I want her to do all of those things she tends to over do it and I'm left not able to partake in conversations, talk about my interests and I feel guilty whenever I ask if we could do something that I also would enjoy a lot

The main reason for my guilt feelings is that every time she realizes that she's done or said "too much" she goes back to saying how she had it as a child and I obviously feel bad for her so I let her continue and make sure that I put my feeling and thoughts aside

Lately we have been talking about this and she (on her own) had figured out that it was hurting me but neither of us know what to do so it keeps happening.

What can I do, or bring up to her and we do together to try and solve this problem?