How do I tell a friend I don't want to sleep over?

Ok so tonight is homecoming night and since neither me nor my friend are going we have had plans planned for tonight for a few weeks now. We're supposed to have a sleepover and the problem is I'm not good with sleepovers at all, I always get homesick for some reason and I'm not sure why I agreed to a sleepover in the first place. The last few times I've tried to stay the night at other peoples houses I've ended up having to have my parents pick me up and take me home. So a few hours ago, my friend told me that our plans were off cause her mom got mad at her and I was really relieved. Now she's telling me that they're back on and I have no idea what to do. I already told my mom that I'm staying home tonight and I honestly don't feel like going anymore. Is there any way I can cancel these plans with my friend without hurting her feelings?