Excellent, as ever. Just one line I don't like:

"I've changed my life for you; I've altered my ways," just doesn't flow as easily as the rest. To me it stands out as being rushed.

How about:

"I've altered my life for you; changed in every way,"

You're not changing the wording much, but it suits the flow of each stanza much better I feel.

Still, tis your poem Miss!