We most often express our love in the ways that we would like to be loved.
Instead, what we should be doing is asking how our significant other feels love. It is not common that any two people receive love the exact same way.
Often times, we feel like were expressing tons of love by doing x y and z! But our partner really doesn't note those things as love, he/she is feeling empty, waiting for v.
Its a simple idea. But it is the root of many relationship downfalls. It is easy to ask or observe what your dearest love is wanting. Then its just a matter of making a conscious effort to express it in that language.
When both partners do this for the other, you cant go wrong. Pure bliss.
And thats the key.