2 die 4 lyrics tove lo

You're thinking of the song "Habits (Stay High)" by Tove Lo, which features the lyrics:

"Two is better than one, but too many is too many So don't get too close, it's better to be alone I'm just trying to get by, I'm just trying to get by Two is better than one, but too many is too many"

The song was released in 2014 and became a huge hit worldwide.