Don't know what kind of music you may be into but the lyrics to this describe that state pretty well 'Nine Inch Nails-All the love in the world'. And I can relate-not being extremely close to anyone.
I'v e come across some texts about us ISTJ's that may be of interest:
" Our Fe function:Manifested bahaviours expected of this function should include a tendency towards sudden outburst that seem negitive and depreciatory to others, prone to thinking negitivly about the way others feel about him or her, concluding that others do not favor him or her without any reason to do so, tendency towards 'poor me' attitudes that just come out of the blue, disliking people without objectivity to do so or atleast giving that impression to others, friendly and tactful one day only to be tactless and unfriendly the next. "
Also..
" Family affairs and holidays are usually important, as is being a provider or homemaker. ISTJs are happiest at home among family rather than meeting new people and approaching new situations. ISTJs need to let loose a little, to take time for people so they don’t become isolated, and to recognize and deal with their own personal feelings. Even free time must have a purpose for the ISTJ and be task oriented. "
In the past OWL..I have isolated myself and was socially lazy as I was perfectly fine in my own world, with family and keeping light acquaintances, plus was hardly interested in being invited anywhere.
Later I felt that it could be useful and be some fun if I got warmer with people. The way to get this done?
Make yourself appealing. See most people don't exactly like you trying to make small talk, trying and trying to be there and get in...there must be attraction and if there is then they will see you as an asset to their group.
Have something interesting to say. To avoid what has happened next time single out particular people you want to be with, it may well be that other people did that because they all formed groups. About a week into a new friendship at school text or call or have some communication outside of the school grounds to progress the relationship-so it doesn't stay at the same 'acquaintance level'.
If it's way too into the year and people are closed off to others and content with the friendships they have, then show these people that you have friends outside of where they are (school, or whatever)? That way they'll eventually believe that you're interesting, have a life for them to get into and are not needy.
Friends are not the ISTJs priority but we've all got to come out of ourselves a little, it might take some time but it's all about gently progressing relationships. I'm sure you've got loads to offer and there'll be someone eventually!