The way I understood the lyrics is that the speaker had trouble committing to a relationship and through the song the speaker made the decision to not give up and try his hardest. He says that he felt alone and far away then he took a hold of reality and took down his barriers or what keep them apart. He decides that he will do everything even if it ends and he has nothing to hide. There is repetition throughout the song. He says that the relationship is too strong and it can not end.
However even though it is obvious that the song is about a relationship I feel like certain parts can be thought of in a different way. Like when the speaker says "no way I'm giving up this time", it can be applied in life to not give up and keep going. Also when he says, "I'm all in for life", it can be interpreted as that he will commit himself to the relationship or that he will commit himself to life. There are other parts of the song that seem to not necessarily speak of a relationship. "Even if I lose the game, I'm all in, I'm all in for life", it could apply to any situation in life that even if you do not win or get your way you have to participate in life.
