@lowselfesteem92, I personally think it’s your boyfriend’s place and responsibility in your relationship with him and with his daughter to speak with her directly about this. Why should you be alone with this issue? It’s bothering and upsetting you.. why can’t you be open with your bf about it and include him?

He’s the one inviting you into his life with his daughter. Therefore I see the responsibility being his, since he is the one common thread between the three of you.

He also has greater clout with his daughter than you do and can probably help turn around her perspective far more effectively than you can.

Are you afraid to bring this issue up to your bf? If the relationship is good, why wouldn’t you? Why do you think it would be a burden? It's in fact both your burdens, yours and his. Like I said, he’s invited you into his daughter’s life, so I believe it’s his responsibility to talk to his daughter about this.

I don't see why you have to be alone with all of this, when it's your bf's daughter, not yours.