You should be glad that you have each other. I think that's a very good thing for both of you. Perhaps you might consider looking for social situations that are relatively undemanding, as in clubs or other organizations where you might be able to engage in limited social activities, say only on a monthly basis. I have a few friends (OK only two, well maybe five at most), but those relationships are relatively loose, in that we only get together every month or two.
BTW, one of my main semi-social activities is amateur radio. There I can do as much, or as little, as I wish.
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"A man needs a little madness...or else...he never dares cut the rope and be free."
Nikos Kazantzakis, ZORBA THE GREEK
Some of us just have a little more madness than others!