"Like most Is, ISFJs have a few, close friends. They are extremely loyal to these, and are ready to provide emotional and practical support at a moment's notice. (However, like most Fs they hate confrontation; if you get into a fight, don't expect them to jump in after you. You can count on them, however, run and get the nearest authority figure.) Unlike with EPs, the older the friendship is, the more an ISFJ will value it. One ISFJ trait that is easily misunderstood by those who haven't known them long is that they are often unable to either hide or articulate any distress they may be feeling. For instance, an ISFJ child may be reproved for "sulking," the actual cause of which is a combination of physical illness plus misguided "good manners." An adult ISFJ may drive a (later ashamed) friend or SO into a fit of temper over the ISFJ's unexplained moodiness, only afterwards to explain about a death in the family they "didn't want to burden anyone with." Those close to ISFJs should learn to watch for the warning signs in these situations and take the initiative themselves to uncover the problem."
Just did a personality test for my OB mod. & this is the result.