Hey, I have a lot of same, similar feelings.

I'm more introverted but can be somewhat extroverted, so I'm a good mix, probably 60 % introverted 40% extro. BUT I also have social anxiety mixed with depression, so when that is in full swing I'm so inhibited, not "myself". I still go out and do things, i wont let it stop me because that would be worse.

I am married though but I still feel lonely, an emptieness inside that never goes away, and I always think if i find the right friends, or a group, or anything or anyone for that matter, that these feeling will go away. But it seems they are apart of me. even in the best of moments i think these feelings are gone and never coming back and then its always back. It must be so hard for him because I am so up and down. so needy, insecure and unstable at times. maybe half the time or more lol

I agree it is a weird and confusing place to be in but I think finding ways to accept and cope is the best thing to do like by finding hobbies and keeping busy as much as possible.