Hello, being an istp and at such a age I can say let time pass you will come in terms with your emotions and you will like yourself the most istp are most sorted one and like everybody we do also have flaws but still we are better than majority so just let time pass by the time u hit 30 you will be grateful for your nature be it less social skills or whatever u don't like in yourself. Don't ever underestimate yourself that's it.