My monster maid of honor

Okay, I asked my best friend/roommate to be my maid of honor because, well we lived together for so long and have been best friends since high school. Who else would I have chosen? She said yes with a huge smile on her face. Now I’m getting married in September of this year so the planning is totally taking off. Whenever I sent out group messages to the bridal party she is the only person who doesn’t respond. She also has told me many times she doesn’t feel involved in all the planning. So I went through the troubles of making her a personalized notebook with every little details that needs to be chosen so we can go through it together. After she received the notebook she still claimed to be feeling out of the loop and that she doesn’t feel like there’s anything that needs to be done as of now. Even though the list is huge. I understand it’s a big responsibility to be a maid of honor but she said yes and has wanted to be involved but she still seems to be throwing up road blocks for me and the rest of the wedding party. She says she wants to help but the communication is not there from her.
I am looking on some advice about maybe just having her be a bridesmaid and demoting her but I feel like it will turn into something so nasty! Help. I don’t expect anything from her i just want some communication and for her to not be such a pity party when I’m totally including her every-way I can