This song is rather bittersweet. The lyrics are quite sad, really. "These two hearts won't make it last [...] but it's okay cause I will stay with you". It's like the two people (the two hearts) fell in love with each other too quickly, the relationship moved too fast. And because of this they won't last, but they still want to be together regardless, for the sake of being in a relationship.
This song is rather bittersweet. The lyrics are quite sad, really. "These two hearts won't make it last [...] but it's okay cause I will stay with you". It's like the two people (the two hearts) fell in love with each other too quickly, the relationship moved too fast. And because of this they won't last, but they still want to be together regardless, for the sake of being in a relationship.
That's just how I interpret it :)