The nuances of social situations can be tricky. Oftentimes, to make it a little trickier, they are different depending on the group you're in. But with practice and attention it is possible to read the subtle clues that people give us in these situations.
Here is something that may help you on the road to discovery re: social cues ....
http://study.com/academy/lesson/what...-examples.html
If you do not naturally understand social cues, don't worry. It can be a learned skill [emoji1303]
Knowing that there are social cues you're missing is actually a good first step. You cannot fix something unless you see the problem right?
Keep up the good work, and keep trying.