(I'm a thirteen year old girl) I would like it if when my mom wanted me to be around her, she would talk about things other than "grown up things". She talks about what I should and shouldn't do, what needs to get done and all those boring things. I would like it if she talked about things that I find more interesting. If she acted my age when she was around me, or told me stories of personal things that happened to her when she was my age( embarrassing moments, first kiss, friend drama she had, pop star crushes, etc. ) than I would like being around her. If she didn't always ask me about my friend drama, but told me about hers. If she took me to special places more often, like concerts, ice skating, movies, and fun places.
Sigh. It's part of life, I'm sorry to say. I can't really give you advice because it all depends on your and her personality as a whole. Honestly just accept it, but never give up. Always strive to relate to her, but just know that it will happen.
But hey, when she's all grown up? She will come crawling back :}