that's unfortunate for you.
personally, i would love to be more organized, more logical, more detail-attentive, and less needy of people.
you're human, mister sad ISTJ, welcome to the club. we all feel lonely, weird, and like we're struggling. i'm an ENFP, your complete opposite, and i feel the same way too. i don't know what i want to do for my job yet either. i also struggle with relationships and have a hard time separating very close friendship and love.
and maybe it's cool to have 700 fb friends and drink, but in my opinion, most people who have over 500 friends don't even know many of those people (or can't remember where they met them), much less do they talk to them, and going out and drinking every weekend sucks because you waste all your money on alcohol and wake up with awful hangovers.
on the downside, there's no solution to this, really. on the upside, there are probably a lot of really great things about being you that you're not focusing on. you've already said you're good at being friendly with strangers and you're good at supporting the government infrastructure that keeps your whole country running.
personally i have a good ISTJ friend who is lovely. she doesn't really like crowds and she needs to plan things in advance (but actually, so do i, i don't like spontaneous plans very much). she's really sweet, very smart, and always on top of things. like patches, she has a small group of close-knit friends that she surrounds herself with. she's an excellent piano player with an extraordinary aptitude for playing very technically complicated pieces. she works in an environmental sector of the government, doing research on new technologies. i think she makes the best of her ISTJ.
see, the thing here, is that i doubt you're actually unhappy about these things themselves. you're probably unhappy with what you think they imply. personally, i'm also usually happier at home with family than meeting new people. i also like new people, though. just because you're happier at home doesn't mean you
can't learn to interact smoothly with people, nor does it mean you're destined to be lonely. plus, it's not good to not enjoy time alone. i don't like time alone very much and that's really annoying to me. i have a hard time when i can't be around people, which means that i'm not always very self-sufficient. there are a lot of good things about being introverted - it's just hard to see them until you're on the other side of the fence. extraversion is made into this big wonderful thing. it's not. it's really not that great. it just
is, just like introversion.
it's how you use it that matters. the same is true for your whole type. it's not what you are, it's how you use it. if you try to be an ESTP, you're going to be one very unhappy ISTJ. if you try to be a happy ISTJ... well then, you'll probably be a happy ISTJ. talk to other ISTJs on the site. see how they deal with people, how they make new friends, how they handle relationships. learn from them and from others like yourself (not all ISTJs are very alike, after all) how you can make the most of your type, because there are a lot of advantages you have over other people. you're more self-sufficient, more realistic, more logical, and more organized than 15 other types.
so, welcome to humanity, get over yourself. ISTJ is the worst type sometimes, just like every other type. we're all the worst sometimes and the best sometimes. try to focus on when you're the best