My family is huge, and I've had four cousins get married over the past couple years. They'd all pretty much settled on the fact that it isn't feasible to invite everyone you know, and you have to draw a line at people you really want to be there when you get married. Your parents can push a couple random people that they'd really like to be there, but in the end, it's your wedding.
If people don't like each other and you like both, then I'd hope they can be adult enough to put aside their differences for one day. If they do act up, kick em out. One way my cousins chose to keep things civil is to put troublemakers at tables with grandparents or just people who you'd be especially embarassed to be terrible with. All in all, just make it a wedding that will be a good memory, and invite the people who will facilitate that.
If people don't like each other and you like both, then I'd hope they can be adult enough to put aside their differences for one day. If they do act up, kick em out. One way my cousins chose to keep things civil is to put troublemakers at tables with grandparents or just people who you'd be especially embarassed to be terrible with. All in all, just make it a wedding that will be a good memory, and invite the people who will facilitate that.
