Have no life

Recently, ive been extremely concerned about this. I have a loving healthy relationship that has been for three years and we love each other but if one day he decides to wake up and leave.. I will have nothing. he has his own life… he has a great job, friends, sociable, hobbies. he would be okay. but me? I have a shitty job with shitty pay I am miserable at, no friends, socially awkward, no real hobbies of my own (all my hobbies are through him now)….. it’s really really concerning. please someone help me with some advice on how I can get my own life too even if this never happens, I still want to do better for myself.