I think he's singing about being with a girl that he shouldn't be with. For whatever reason, she's somebody else's girl, she's his bad ex, or it's just him convinced that he can't have a relationship; only now he's being presented with one small moment to be with someone.
'I wish I didn't need you now' he's trying to be without this person but he needs her.
'Welcome to the end' doesn't have to literally mean the end of life, just the end of one kind of life he's living.
I think he's singing about being with a girl that he shouldn't be with. For whatever reason, she's somebody else's girl, she's his bad ex, or it's just him convinced that he can't have a relationship; only now he's being presented with one small moment to be with someone.
'I wish I didn't need you now' he's trying to be without this person but he needs her.
'Welcome to the end' doesn't have to literally mean the end of life, just the end of one kind of life he's living.