Here, love is imagined as an ocean, and the ocean is another person's mind. The speaker wants to swim in it and never leave. That sounds romantic at first, but the second half darkens the picture. The speaker plans to drown their secrets and dreams there, and even calls them "corpses" that will sink without ever landing, because "there is no bottom."
The speaker seems to feel both devotion and surrender. The loved one is vast and endless, a place so deep that nothing put into it can be found again. That could be comforting: a safe place to hide what hurts or what feels too fragile to keep. But it also hints at loss, since the speaker is giving up their own dreams along the way. The mood is intimate, quiet, and a little eerie, mixing deep trust with the risk of disappearing entirely into another person.