I think this about a guy who has problems with intimacy and continually disappoints and hurts the women he gets involved with because he "regrets" and then abandons them. The verses are sung by the male singer and the chorus (mostly) by the woman. For him, he's saying to her he knows he'll only let her down because he can't get attached, but despite that he seems to regret his behaviour "won't forgive myself inside", he also seems to be feigning responsibility for his actions by being depressed and fatalistic about this inherent flaw that he feels is inevitably a part of him. For her, she knows as soon as she falls for him or as soon as he falls for her, 'fell into his eyes', he is already long gone.
I think this about a guy who has problems with intimacy and continually disappoints and hurts the women he gets involved with because he "regrets" and then abandons them. The verses are sung by the male singer and the chorus (mostly) by the woman. For him, he's saying to her he knows he'll only let her down because he can't get attached, but despite that he seems to regret his behaviour "won't forgive myself inside", he also seems to be feigning responsibility for his actions by being depressed and fatalistic about this inherent flaw that he feels is inevitably a part of him. For her, she knows as soon as she falls for him or as soon as he falls for her, 'fell into his eyes', he is already long gone.