I have a fake instagram to check up on my ex-girlfriend
Do you miss her that much?
I still love her and care about her.
It's normal to wonder what is going on with your ex, but I don't think stalking them online is healthy for you. You probably will be better able to move on with your life if you get rid of your stalking account and just focus on yourself. You'll probably always be single if you can't get over your ex.
Is it really a bad idea? I still love her.
It will fade in due time. Use all that time to meet someone new and you'll forget about your ex eventually.