I think its ok to be hopeful when they show you good signs, but make them work for it a little. That doesn't mean doing anything to push them away but be careful not to lay on any pressure or expectations. From what I've seen from my own and other's experiences, it seems like it's pretty common for them to go back and forth. There have been several times I've been almost convinced my H and I had made it to piecing, but it seems every positive step forward is also accompanied by a freak out session that backs things up a little. We are still making forward progress...it's just slow.
So don't just in with both feet...just be positive and accepting and if it's real, they will show you.
