What does this mean from a relationship standpoint?pls help?

I think he is basically sayin' Back Then Didnt Want Me...Now Im Hot...U All On Me!!! That how I took it.....cuz he says " ...funny how sum1 elses success bring pain, wen ur no longer involved, that person has it all, and u just stuck sittin there but I'm gunna need u 2 say sumthing baby....." lol