Being excluded can make you feel pretty bad (it is like being rejected), though when they do decide they want you around it is nice too. I imagine, this is just the place where he looks to get away and escape. It is sad that he would pick a place that you both have so many ties to. The good news is with so many of your mutual friends there you know where to find him if you needed to, and he isn't going to do something inappropriate in front of so many people that know him. I wouldn't worry about him walking out of the pub and embarassing you, if anything it may draw attention but he will look like the one making a scene in front of your friends.
TwinDad Me 39, W 36, M 11 W - MLC, WAW???? 2 Kids B/G 3 YRS Old Start of the Long and Bumpy Road..... On the verge of piecing.....a new beginning