My interpretation is that he's been there for her for a long time and is waiting for her to trust him, but she's been badly hurt in the past and although she is trying to trust him, some part of her expects that he'll take off as soon as she takes her eyes off him. He's telling her that he won't and that he loves her and wants to show her what true love is.
My interpretation is that he's been there for her for a long time and is waiting for her to trust him, but she's been badly hurt in the past and although she is trying to trust him, some part of her expects that he'll take off as soon as she takes her eyes off him. He's telling her that he won't and that he loves her and wants to show her what true love is.