Better Day

My Mum is actually letting me talk about the happy memories I have of the time that we were together and not criticising. I find that if I have space from my friend that recently lost her husband my Mum and I can talk and I am not stressed and I dont think about him as often or what I've been through. I also find that I am now starting to feel that I am smarter by way of the way I conduct myself as I would never do what he did to me and leave someone in silence with no explanation. 
 
I have had two days space from my grieving friend and told her my phone was broken and was going dancing to get space (not true)as I feel like I am so stressed and going backwards with my progress as she is so needy as her husband handled business and household issues. Feel like this makes me a bad friend as I don't want to hurt her feelings but I need time to myself too. Any suggestions on how I can talk to her about it. We are very close friends but she's starting to affect my life.