Do you want to talk about why they make you nervous? Is it just about effectiveness issues (which aren't actually an issue: currently, they're just as effective as external condoms are), or is there more?
That said, is your boyfriend using a little lube inside the condom? If he isn't, that's probably why they hurt (and any kind of condom often won't feel good after a while when the wearer doesn't have a little lube inside -- IMO, I think it's one of the top reasons people who say condoms are uncomfortable do, because they don't know to put lube in there), and likely what can change that.
Never doubt that a small group of thoughtful, committed citizens can change the world. Indeed, it is the only thing that ever has. - Margaret Mead