1. They like to have "sleepovers" but you're not getting ANY action not even a handjob
2. You hear ALL about their sexcapades with other people
3. They call you LIL BRO or LIL SIS
5. You help them get ready for dates and/or you hear ALL about their dating problems
6. When they tell you "why aren't there more of you"
7. They end text messages saying "see you later", "ttyl", "have a good night"