In my diagnosis, the narrator of the song called the girl he was dating "a bad bad," which means she was unfaithful. So, he's considering leaving her after she cheated on him. But, he still loves her and she's not making it easy for him to call it quits. She still wants to work on their relationship. Her "love would he too much" artistically expresses what it's like for someone to strongly fight for your love even though they've broken your trust.
In my diagnosis, the narrator of the song called the girl he was dating "a bad bad," which means she was unfaithful. So, he's considering leaving her after she cheated on him. But, he still loves her and she's not making it easy for him to call it quits. She still wants to work on their relationship. Her "love would he too much" artistically expresses what it's like for someone to strongly fight for your love even though they've broken your trust.