I had gen warts too and, like you, we didn't have sex for a while..
Condoms can help protect him from skin contact if your warts are inside, but of course condoms have their faults..
if your warts are outside, it's a little more difficult.
I know it sounds completely weird, but my gyno even suggested (for external warts) is put duct tape over them. I wouldn't have tried it except that we were getting REALLY frustrated with the condoms and they weren't protecting him anyway since he could still get skin contact (they were at the very bottom of my vagina near my anus) so we tried the tape and it worked pretty well. He's already infected with the HPV virus because of me..
Once your warts are gone, you shouldn't have to deal with that anymore.. if your warts are gone, he wont catch them from you that way.
continue using a condom though if you're concerned..
My bf and I haven't been having sex since my biopsies (I've developed cervical dysplasia) but my warts are gone now so, according to my doctor, we should be able to resume our normal sex life.. But remember to keep a check up on yourself with the pap to make sure no changes are being made with the inside of your body too..
Is he supporting you? Did he know about the HPV before you got engaged? I hope all goes well and good luck with the wedding