As a dad to three daughters, I have always made it my business to be respectful and polite to all my daughters' boyfriends from first meeting onwards.
As time has shown, with the passing of time, those boyfriends have become husbands - and you never know which one it might be, so your children deserve the respect for their choices of partners, and I have always gone with that.
So introduce your boyfriend - you are only dating, not planning to elope!
Parents accept that their children are growing up, and dating is part of that process.
Good luck.