Why Don't We - In Too Deep Lyrics Meaning

I believe this song is about someone who was hurt in the past or was scared to start loving again (used to be scared of the ocean, cause I didn't know how to swim) and then met this person and they fell in love (I took one sip of your potion now I'm just diving right in) they start falling hard and don't regret it (I heard your sirens call it was beautiful im drowning but please don't save me) and falls hard (im in too deep cant touch the bottom with my feet) and doesn't know why they fell so hard ;-; (don't know what you did to me)