Being alone is less lonely than to be in a room full of people who don't talk to you. Why don't they talk to you? One of many reasons:
1. They are not your tribe (I coined this phrase too - originally - when I was doing acting and thought those people were my tribe). When people don't get you...they don't even begin to know what to say to you. Your 'Tribe' is the one that 'Gets' you. Save yourself the hassle of trying to fit into where you absolutely do not. You will either compromise who you are or feel inferior to those around you - either way - it is not acceptable.
2. Congratulations...you have politicians. My sister was born in the year of the rat and I couldn't think of a better sign for her...well...maybe a sign AT her. If she had an 'Audience' she could say any one of her random theories based on solid conjecture... or the logic: if x=1 then w+x+y+z = 1 where w+y+z have values but they are not known. Think about it...we all do it to some degree. The probability of doing it is actually inversely proportionate to your insecurity (because fear makes you judge quickly). Previously I've talked about how having insecurity makes the need for control more pressing. Social politics is all about power. If these people can't find the buttons...it freaks them the fuck out and you stay on the outside. In other words; this is not your shit...it is theirs. Believe me.
3. General fear. In decades earlier, people would talk to each other on the bus or where ever they found each other with random abandon. Having a conversation with a stranger was normal. Now the idea that anyone could be a freak or weirdo has people not making eye contact and dropping the conversation ball from strangers like it was hot. I feel it too. The last time someone came up to me with a friendly disposition and tried to engage me in conversation, they told me that their family had been stranded and he was trying to raise enough money to get them back to Langely. Oh...where is your family? Oh...invisible in an empty parking lot...I see them now. In other words, he was a drug addict. Then I'm walking down the street and a woman looks at me like I'm going to attack her. Well...then again...I do live across the street from the Elizabeth Fry Society.
So, in conclusion, there are many reasons that you feel alone in a crowded room. With fear comes insecurity and politics. When people don't know who you are, they don't feel comfortable around you. Be also compassionate. It is the time where people are worried about their own future and their own issues. People are hurting. When people are hurt they get egocentric. It's just the nature of the beast.
Be well people