"I'm yours"

[gmalivuk]

So, how would you explain or simplify the meaning of this expression (in the romantic sense) for someone learning English, *without* bringing up (and then trying to somehow also explain) all the complicated baggage of love-as-possession and such? Because in addition to that being extra difficult to explain on top of it, it's probably not literally in anyone's mind when they use the phrase, anyway. (At least, I would hope that the student in question didn't hear that from someone who meant it with the same depth one might impart in their marriage vows or something. After all, there's clearly still a language barrier to work through first.)

Also, I don't want to creep the student out by interpreting as an expression of deep undying love, something that might have just been innocent flirtation from someone else who also lacks a complete grasp of the language...