I'm in an open relationship- it's great if it's what both people want! But if you don't want it, don't be pressured into it. That is not a boundary you want to allow your boyfriend to cross. It sounds like he may be insincere about the reasons he wants this, or you may just not be compatible anymore- either way, you have every right to make your needs clear.
Music festival? GROSS ?
I'm in an open relationship- it's great if it's what both people want! But if you don't want it, don't be pressured into it. That is not a boundary you want to allow your boyfriend to cross. It sounds like he may be insincere about the reasons he wants this, or you may just not be compatible anymore- either way, you have every right to make your needs clear.