When you think to yourself or say to someone "I don't know/understand you or the person you are right now" maybe you stop taking the time out to learn from them, guess you'd rather be spoon fed the information rather than seek it and learn for yourself, then you blame them when you're starving........

This only applies if the person you're becoming disconnected from is NOT doing dirt behind your back, then of course they would be different, they are actively hiding stuff from you that normally changes their behavior if you're looking close enough.