Sometimes, being alone sucks

A few post back I mentioned about me going back to the old me...the loner me...
although that feeling has subsided for some time now but I still prefer doing things alone...
however...( this indicates counter point according to my GP teacher )
it's not always being alone...sometimes when I go somewhere or do something by myself I saw things that 'disturb' me...
it's like everywhere I go, other people are with their girl/boyfriend or with their friends or family at least...
and look at me...all alone...ha..ha..
it's like that other time...I was going to watch 'The Hours' at Lido...then when I bought the ticket and said one ticket please...something hit me...
I don't know what but it's just sounded sad...and lonely...
I went to watch 'Finding Nemo' just now and when I said the same thing...It hit me again...I'm going to watch this movie all by myself in a room filled with people who are not alone...
then it hit me again...
and it's not just when I went to the movie only...sometimes I feel it when I'm eating in some fast food restaurant...
I'll be seating alone eating my food while the people around me are busy talking with their partners...
I feel kinda sad...but I don't know is it for me or just the situation...?
the funny thing is I chose to be alone and now I'm lamenting about it...
yeah...criticise all you want but I'm human and I'm not perfect...
so let me complaint...