I feel like an outsider

I can relate to this too- what I really want to say is that there are people out there that you will connect to - it's just a matter of finding them- which is not easy. In my experience not wanting to hang out with people is often a sign that's those are just not the right people or that I am just too overwhelmed/ burnt out in general. I have found some people I connect to through shared interests (mainly while at uni)- and I am surprised myself sometimes that with some people I can happily spend quite a long time together which would have been unimaginable. But it really depends on the person. I'm also quite lonely at the moment though and it is hard. And being leftout feels awful- it always makes me feel weird and I am just puzzled by how others can find it so easy and actually enjoyable - but I think you will also find people that you are happy to interact with- those people that you are seeing and feel left out by are just not your people probably. 

I can relate to this too- what I really want to say is that there are people out there that you will connect to - it's just a matter of finding them- which is not easy. In my experience not wanting to hang out with people is often a sign that's those are just not the right people or that I am just too overwhelmed/ burnt out in general. I have found some people I connect to through shared interests (mainly while at uni)- and I am surprised myself sometimes that with some people I can happily spend quite a long time together which would have been unimaginable. But it really depends on the person. I'm also quite lonely at the moment though and it is hard. And being leftout feels awful- it always makes me feel weird and I am just puzzled by how others can find it so easy and actually enjoyable - but I think you will also find people that you are happy to interact with- those people that you are seeing and feel left out by are just not your people probably.