@GreyCarpet Thanks, I appreciate you saying that. Genuinely horrified at the thought of being seen as smug, it's really not my personality type at all.
@Bjorkdidit Thanks for sharing that thread. Most (ok, some) of the time I don't feel it's my responsibility. He does come and do some things with me sometimes, indeed he would likely do more, but I say no at times because it isn't appropriate (e.g. meeting up with the girls when no one else is bringing a partner). I would feel responsible for ensuring he has a good time and feels comfortable if I have taken him to somewhere that's for me. E.g. to a wedding of one of my family members, or to an event with my friends.
@AppropriateAdult @IpsyUpsyDaisyDoos I absolutely get what you are both saying, and although he isn't complaining or moaning at me, he has, on a couple of occasions gently expressed that he would like to spend more time with me. So although he isn't putting pressure on me, the pressure comes from knowing that he wants even more from me, but I feel stretched far too thin and I don't have any more time to give. I think he wants to see me more because he doesn't have other social aspects, and relies on me for most social contact. If he would do other things, I think he wouldn't rely on me so much for being 'something to do'. I too also need a lot of time alone, so I get it, and I definitely don't think he should socialise as much as me, but he clearly wants more socialisation in his life. He also sometimes wants to come on social events with me where it wouldn't be appropriate for him to attend. E.g. my friends are pretty much all either women with young children (so husband's are at home looking after the children while we go out), or single women. So it would be weird and change the dynamic for me to be the only person bringing a partner, and he would be the only man.
I'm also intrigued at the single people on this thread complaining that friends in relationships want to see them on weekends when their partner isn't around and see it as a negative thing. Surely it's just people arranging to meet friends when it's mutually convenient for them and when they have a gap in busy diaries. As in relation to the points I made originally, I guess it's just difficult when one persons availability is different to the person they want to spend time with, meaning everyone can feel dissatisfied.
I'm also aware this has swayed from the OPs point somewhat, so I apologise, but wanted to respond to points directly made to me.