| Your poem lacks variety. The similar lengths of the lines are good though the line "Promise never ever leave" doesn't work. "Promise to never ever leave" would work better, but it's still meh. "You left and my soul died" could use a comma after "left." The word "But" would work well before "I suppose that you just lied." That being said, these are just superficial fixes. The poem could use a revamping in general. Variety in word usage is my main suggestion. | 
