help ask me desk

hi
im in my early twenties and find myself lost, i have the job i want live i have friends etc, i wanted to hook up with ppl but now i dont im not interested in anyone, and dont think about ne1 apart from a recent ex, i go out but find myself not knowing what to say i used to be an extravert now i am quiet i prefer solitude, and prefer slow music at a pub or something than a club, i dont really care for sex, and i go out and feel crap after, i look on facebook and feel like i should be living my life differntly and that one day ill regret not experiencing things ike uni etc, i feel like im not living my life and having enough fun because i get jealous of other peoples lives, lately ive been thinkin more and more like what nostics thought, and like im living in a matrix type thing tat ive created this world, or a coma or a matrial world where we are just like spirit type, i dont know where my head is or where my heart is and i feel really lost, i have friend i have family i hav everything i need but i feel like i dont know what i want please help any advise would be appreciated x when i was in a relationship i felt anxiou that id lose it the happiness but i always craved being free now i am free i dont know wha i crave and ive no interest in sex that much i just feel never stisfied and dont know what would satisfy me apart from love and i dont really know ne1 i like that much and enjoy being alone now, i want to travel and that is keeping me going but i feel at the moment like i am ahead of life in my head if that makes any sense