Hi Kitty. You could go several ways with this structurally. Terry and Polly seem to favor the addition of a chorus - which musically should work with most genres. But that would leave you with ABABAB - which is okay perhaps with a musical solo between Ch2 and V3. You could also modify that structure to replace V3 with a bridge(you could use some lines in your current V3)and go ABABCB. Another way to go is AABA. I'd use "But for now you have my heart" at the end of both V1 and V2 and only change it at the end of V3. The AABA would go better with a Blues/Jazz slower type of song. So you would write your bridge accordingly. Best wishes.