I don't think that he's gay, because he says "Losing you is painful to me" I mean, if he's gay, he wouldn't feel pain for leaving her. I think he's in love with another girl, or maybe he's just confused. He wants to stop the lie, because he feels that he cannot give her the love that she gives him...
I'm really not sure, but I think it would be the meaning
I don't think that he's gay, because he says "Losing you is painful to me" I mean, if he's gay, he wouldn't feel pain for leaving her. I think he's in love with another girl, or maybe he's just confused. He wants to stop the lie, because he feels that he cannot give her the love that she gives him... I'm really not sure, but I think it would be the meaning