The key thing is to 'stay in the mix' - i.e., keep up the involvement with age-typical peer group activities. The move will likely have little or nothing to offer by way of your daughter's peer relationships. It won't solve the problem and it won't hurt either. It does appear that something is occurring that makes it hard for her to establish herself with peers. Nothing you describe indicates what might be going on. You might check in with the faculty at school and with parents of other children she knows and see if they can offer you some insight. Especially with girls, the second and third grade years are challenging some of the time because the kids tend to have problems sharing friendships. That is, they do well in duos but start to have trouble with trios or triangles. Their friend who then makes another friend is threatening because such children tend to see the peer's new friendship as a threat to their own friendship. If this is the case with your daughter, development takes care of the problem most of the time.