Lyric discussion by JeremyHafford 

Cover art for Water lyrics by Breaking Benjamin

I personally think that this is a "love" letter to an ex, describing how his love for her (him?) will never falter and he will be there for her, hence the "I won't ever let you drown". But it also must have been toxic, (see "I'll shove your head underwater." Bloody good song though!

My Interpretation