Love is ONE such emotion that can give the experience of complete "dissolution". No other emotion is capable of indicating a taste of That which is tasteless. This is why the word "love" is so much used while pointing to That, which is Inexpressible.
In true love or at that ecstatic moment, the individuality is completely dissolved, including the idea of oneness. It is a state of no mind (or intellect). That is why it is ecstatic.
You are not ONE. In the dissolution of the individual identity, the Infinitude of the Being is experienced. It is called Pure LOVE; Pure Ecstasy; Pure Bliss.
When YOU dissolve; when the individual identity melts away; Ecstatic Love is experienced.