Give me the interpretation of last two lines of "Lover's Farewell" by M.Drayton.

The lover believes himself dead because the affair (marriage, as there are vows spoken of here). He wants a clean separation, end to the relationship, because if there's no definite end he can't live again.

"Now if thou wouldst, when all have given him over,

From death to life thou mightst him yet recover!"

He desires recovery from heartbreak.