It´s lacking the ring.
You forgot the ring.
It seems like you forgot the ring.
The last one softens the statement, it´s good not to seem rude.
On the other hand, Lois P. Frankel (author of the book Nice Girls Still Don´t get the Corner Office) would say that it weakens it. By this reasoning, it would seem like you are making a tentatively affirmation, not much confident. So, it goes with the setting and the message one tries to convey, and the audience as well.