Cracked & Dilapidated Feelings

I was standing with his grandfather while he was cleaning a cement walk way - with precise detail to each crack even... we were behind what looked like an dilapidated cement wall that was once the front or rear of a house... I saw a car pull up... another girl that was interested in him.. and he may have once been interested in her... he excused himself from my company to go greet her... the feelings I felt by this are hard to explain... in dream I have no idea who any of the other characters in this dream were.. I didn't even really feel like myself... but I caught part of their conversation as it coasted in on the wind... he was explaining to her his feelings for me to her great disappointment.   It's interesting to hear people talk about how they feel about you when they don't think you are listening.  Why can't people talk like that to your face?