if the sentence starts with the ‘if’ clause, you need to put a comma between the two clauses. (- as i just did with this sentence which is first conditional). when the ‘if’ clause is at the beginning of the second clause, a comma is not necessary because the word ‘if’ is a conjunction. that you were not, are not, the man i needed. that’s the beauty in letting go.
i was losing myself waiting for you to love me. but empty promises and empty words could not keep me warm, not as well as a life fully lived.
not as well as a heart fully loved. 