My boyfriend of 2 years graduates this winter. He never got a high school grad party and says he doesn't think his parents would throw a college one either. I've hinted at me throwing a "surprise" party for him inviting some friends and both of our families that haven't met yet. He's super close to mine and said he'd want them there. I live in a townhouse with 3 other girls off campus, but the party would be after finals while people are gone for break. Assuming they say it's ok to have the party there, I'm worried that his parents, especially mom, will feel offended or weird that I threw it even if she wasn't planning to. He said I have an engagement ring coming after his graduation and we're serious, but I'm worried that his family will be offended in some way, or if that's not the place to have the families meet. The thing is, he's close to my family too and wants them there and wants a party, and if we're getting engaged soon they're going to have to meet sooner than later. Any thoughts?