I wax and wane with this negative core belief...at times, I think things are fine with my friends, a few days later so insecure. I try to rationalize and tell myself, nothing has changed. However, then I find myself "looking" for things. Then I finally talk myself out of the insecurities and am okay.....don't know of any mitigating factor that initiates this waning process. However, I also have to quit looking for cause and effect. Meaning an event, it's my thinking and those series of questions - what if it's true, I wish I could quote them - can't rmember them all yet....but they help.