Needing quiet after a party isn’t antisocial. Some people just refill alone.

Enjoying people and needing recovery from people are not in conflict, though they get read that way, usually by you. Three hours of noise and talking takes something out of some of us, and what puts it back is an empty room rather than another plan. That is a wiring difference, not a verdict on the evening or on anyone who was there.

Build the quiet into the plan instead of apologising for it afterwards. Leave a little earlier, or keep the hour after free so you are not heading straight into something else. Knowing that hour exists tends to make you better company while you are there.