hi pj, some good thought provoking questions!!! why don't you just start to do the things you'd like to do even if hubby doesn't join you? since you miss having a bunch of friends and sound so outgoing i'd say go for it. this is your life. yes you're married but that doesn't mean your individual life has to stop.
i sort of felt like you when i was young and first got married. my husband was really laid back and i was a social butterfly before we married. i thought gosh will i ever be able to have a grilfirend to hang out with anymore??!! i almost went into withdrawal...lol. so i just got on with it and got involved with the things i was interested in. hubby may eventually get bored without you around all the time and will perhaps join in. who knows? all things are possible.
but i'd encourage you to enjoy your life to the fullest and if all else fails at least you'll know where to find your hubby when you come home....on the couch watching sports.