Every time I listen to a song about my father I will burst into tears because I never thought of hishe would leavinge and I’m was not prepared for it at all. Every time I listen to a song about my father I will burst into tears because I never thought he would leave and I was not prepared for it at all.

I am not entirely sure of what you were trying to say, so I corrected this the best I felt I could. This sentence should be in past tense.

Every time I listen to a song about a father, I will burst into tears because I never thought of his leaving and I’mmy own father left us so suddenly and without warning. I was not prepared for it at all. Every time I listen to a song about a father, I burst into tears because my own father left us so suddenly and without warning. I was not prepared for it at all.

When I listen to this song, I can’t help sheddingbursting into tears again. When I listen to this song, I can’t help bursting into tears again.

Typically, we would just say crying, but it looked as though you were going for the phrase "burst into tears".