"
Now my night's so cold
When your heart is frozen
Mine's exposed you know this
Try to blame the fame for the way I've changed
And you know those claims are bogus
Baby it's not me, it's us
Maybe now all we need is trust
Maybe this Hennessey will solve our problems
Baby pick it up
These lines are talking about how when the girl is ignoring the boy (or having a cold heart towards him), it's like his night is cold too and his heart is exposed to everything. The lines "try to blame the fame for the way I've changed, and you know those claims are bogus" suggest that the girl may have left the guy because she feels him becoming famous has changed him. He, however, disagrees. He thinks all they need is trust and maybe some alcohol to solve their problems.