The speaker is looking at the words people use to describe "true love" and doesn't like what they see. Intoxicating, uneasy, suffocating, nervous: none of these sound like comfort. They sound more like being drunk, trapped, or afraid. The quotation marks around each word make it feel as if the speaker is holding these descriptions at arm's length, quoting them back with doubt, maybe even a little disgust.
The last two lines turn the poem sharply. If love really is this anxious and smothering, the speaker would rather make "the whole universe" an enemy. That's a huge, almost dramatic claim, and it suggests that being alone, or being against everyone, would feel safer and freer than love of this kind.
The mood is tense and defiant. The short, clipped lines give it a blunt, stubborn feel, like someone who has made up their mind and refuses to be talked out of it.