For any magic to work you have to put forth effort to assist the outcome. Expecting people just to walk up to you and take to you won't make for good conditions to even attempt a spell.
I suggest you try to connect with someone, talk about yourself, and take interest in other people. No matter where you are, you're likely to find someone willing to be at least a friendly acquaintance of yours.
i agree with amity, you need to put forth the effort for spells to work. you could try a confidence spell or a glamour spell, but again, it will only help so much if you don't put forth the effoty. cast a glamour spell, then the next day ask if you could join some people at lunch. small things like that.
maybe a crystal could help, bring a quartz with you for luck or something, when you feel nervous, hold the quartz and say something to draw strength.