<em>I Shall Not Care</em> falls into the "experiencing failed love" category because there's evidence from the first verses that one of the lovers is no longer corresponding the other one. Passages such as "Tho you should lean above me broken-hearted, I shall not care" denote there's one person who is not loving the other one anymore.
The title itself expresses the intention of this poem, that in a near future, after a stage where she will feel dead, the author will be "more silent," "cold-hearted" and have "more peace." He, on the other hand, will be left on "deserted places," "shadowless" and thirsty.
On the other hand, <em>Dew </em>fits into the "falling in love" category. It uses the first verses to describe calm, beautiful imagery. Dew are small drops of water that form during the night and are quite refreshing, while the "rainbow gem", "jewels" and "pastures" all evoke nice, sparkly and shiny sensations.
Later on, Teasdale expresses how the new love: "your love, my lover, fresh as the dawn" is making her travel through a refreshing and shiny road only she can enjoy. "Delicately alight, for me alone" means this love is something new for her and it is a journey she is happy to experience and feel to the maximum.
Finally,<em> Lights </em>shows two people who share the same home and are comfortable with the shadowy space they have for themselves, away from the lights. They feel "safe in our own love and the gentle gloom," apart from the exterior world.
In the second and third stanza the author describes the lights and streets of the city that surrounds the lovers. They feel pity for having something so special and unique, while the rest of the people are not "wholly joyous, proud and free." This poem depicts a couple who have been together for some time already, so it is in the "being in love" category.