Usually when a cancer goes cold something has happened to make us loose interest....sometimes it could be another person and have nothing to do with you (although it will affect you). However, in this case I think that it's too early for you to jump to too many conclusions....he could legitimately be busy. Thank GOD if you've found a cancer that both knows how to love deeply and completely and also give you a little personal space....the latter of the two is often a difficult lesson for us to learn. chill out for another day or two and see what he does...then we you do talk to him...see if he offers up an explanation without you saying anything...you'll know what to do from there.