Should I tell my friend she should spend time with her kid?
Maybe. When will you actually going to go tell her that?
When I'm feeling like I want to go out. Also I don't like the way she spends with time her frenemy
While it's nice to care for your friends, you shouldn't butt into every single detail of their life. That is their kid, and not yours and you can't overstep your boundaries and tell her how to raise her kid. You don't know the kids needs and wants like she does.
It was only advice, you don't have to tell me what to do with my friend.
Sorry if you are upset but I was trying to help you out. Your friend might get angry for you being all in her business.