<human>: Condense the text into a few key points

The relationship I had was really really toxic for me, mostly for the fact that my girlfriend was skilled in gaslighting. I honestly don't think she did it intentionally, she doesn't seem that manipulative, but it has had a far greater effect on me than I've previously realized.

I was having a conversation about gaslighting earlier, and after some research (made sure all of the sites were legit, all of the stuff I found were from PhDs.) and realized I still suffered from several symptoms, most evidently constantly questioning myself and being over-apologetic, even when I knew it wasn't really necessary.

I just never noticed until now that this type of stuff probably isn't normal, and was hoping that some of the people on here might have dealt with similar situations, and had some advice on rebuilding confidence.
<bot>: Girlfriend used gaslighting to keep me with her for two years, just realized I'm still experiencing symptoms 6 months after the break up. Please help.