<p>I think you should stay on until you’re ready to commit to one or the other (see other thread), but I also agree that promising to attend and then dropping the notion is “just not right”. My school’s Robotics team have a policy of “Freezing the Design” as soon as a major decision have been made, and I personally think that this applies very strongly here. Agonize over your choice as much as necesary, but once you’ve made it, commit to it.</p>