I'm reading it as... quite literally, there's a girl that he wants, but it might not work out. Doesn't necessarily mean it won't, but you know how things are sometimes. But music will always be there for him, it's certain, and he can always convey a message through his music. It's like he's hoping she won't close her own gate on him, but the gate of music won't no matter what... However, doesn't make me right about it.
I'm reading it as... quite literally, there's a girl that he wants, but it might not work out. Doesn't necessarily mean it won't, but you know how things are sometimes. But music will always be there for him, it's certain, and he can always convey a message through his music. It's like he's hoping she won't close her own gate on him, but the gate of music won't no matter what... However, doesn't make me right about it.