a slight over reaction on your behalf there... i mean you're still seeing each other, right? and as he said you're welcome, you should arrange to go out and go back to his for the night or something. fair enough he could ask you over too, but i think this older relative could feel uncomfortable with a 'young couple' hanging out around them, they have pretty different views on relationships compared to the younger generations. id say apologise, that you over reacted and that you shouldn't have said what you did. what else can you do really....
They called us a dead generation,
They told us that we wouldn't survive
They left us alone in the maelstrom
As you can see we're all clearly alive.