My friendship with an LIE, initially very rewarding, went to hell when we moved in together, and it's never been the same. At first it actually GAVE me confidence as I got plenty of approval for using my base function, which I loved, but it soon made me painfully aware of my shortcomings. It also awakened me to my neglected need for Se--this one had particularly strong Se. The relationship lasted four years and wrecked my self-esteem. The sad part was, I lost most of my friends during the time the LIE and I were close as she sort of dominated my attention. Now I mostly socialize with supportive extroverts, the notable exceptions being my ILI best friend who I have this soulmate-like connection with.