Any moms of adults on here?

How do you know what's going on with your kids without being told? I got out of a serious relationship a few of months ago and an old friend and I reconnected not long after. I knew people would judge because I just got out of something serious and we don't have a lable or anything so I didn't see the need to tell anyone we were talking. Well last night I stopped over at my mom's because I was having one of my anxiety episodes and she calms me down. And I still didnt tell her anything about him and she says something like "I know it's hard when you feel like you care more about someone than they care about you" and that's exactly what I was feeling but I never told her anything! I just don't get how she knows this stuff.