istikhara

Assalam.o.alaikum brothera and sister.
I want to know about istikhara
I have got marriage proposal and performed istikhara for that. First time i saw i m packing my things and leaving from home to that guy as it was not clear but it was in mind that i m going to that guy and my parents said donot worry tgey will takecare of every thing. I thought i saw that dream bcozof that proposal stuff inmy mind.next time i saw fighting with my cozn over an other proposal that he didn't tell us and i accidentally came to know about that. And in last he say i know every thing and he was talking about my tecent proposal. What does that mean. Pleasehelp me. JazakAllah